朋友对我讲了这么一件事:一次,在同外商谈生意时,翻译把'我们的产品物美价廉。'译成'Our products are of good quality and cheap.'当时外商就迷惑不解:good quality 的产品,怎么又 cheap 了呢?随之而来的便是一番解释...朋友对我讲了这么一件事:一次,在同外商谈生意时,翻译把'我们的产品物美价廉。'译成'Our products are of good quality and cheap.'当时外商就迷惑不解:good quality 的产品,怎么又 cheap 了呢?随之而来的便是一番解释,直到外商看见了产品,又得到了报价,这才放下心来。问题出在哪里?原来,cheap 不光指价格低廉,它还有其它的意思。先请看例句:Her socks looked cheap and nasty.她的袜子价廉质劣。展开更多
INSPIRED by the Belt and Road Initiative,China＇s four-year-old blueprint for multinational trade and economic development, the China Trade Week （CTW）, is making its mark in Africa. Besides dispelling the misconcept...INSPIRED by the Belt and Road Initiative,China＇s four-year-old blueprint for multinational trade and economic development, the China Trade Week （CTW）, is making its mark in Africa. Besides dispelling the misconception that Chinese manufacturers produce only cheap and low-quality items, the event is also a platform to introduce companies from different provinces in China.展开更多
The development of catalytic carbonylation reactions has increased considerably.Although many reviews/chapters/books on carbonylation reactions have been published,summaries on cheap metal-catalyzed catalytic carbonyl...The development of catalytic carbonylation reactions has increased considerably.Although many reviews/chapters/books on carbonylation reactions have been published,summaries on cheap metal-catalyzed catalytic carbonylation reactions of aryl halides and other chemical bonds with high dissociation energy C–Y(Y=O,N,H)are still very rare.Focusing on green and sustainable chemistry,this review summarizes and discusses the achievements on carbonylative transformations of aryl halides(C(sp^(2))–X)and strong bonds C–Y(Y=O,N,H)based on non-expensive metal catalysts(Co,Mn,Mo,Ni,Fe,Cu),photochemical and electrochemical systems developed in recent decades.展开更多
Developing cost-effective and high-performance catalyst systems for dry reforming of methane(DRM)is crucial for producing hydrogen(H_(2))sustainably.Herein,we investigate using iron(Fe)as a promoter and major alumina ...Developing cost-effective and high-performance catalyst systems for dry reforming of methane(DRM)is crucial for producing hydrogen(H_(2))sustainably.Herein,we investigate using iron(Fe)as a promoter and major alumina support in Ni-based catalysts to improve their DRM performance.The addition of iron as a promotor was found to add reducible iron species along with reducible NiO species,enhance the basicity and induce the deposition of oxidizable carbon.By incorporating 1 wt.%Fe into a 5Ni/10ZrAl catalyst,a higher CO_(2) interaction and formation of reducible"NiO-species having strong interaction with support"was observed,which led to an∼80%H_(2) yield in 420 min of Time on Stream(TOS).Further increasing the Fe content to 2 wt.%led to the formation of additional reducible iron oxide species and a noticeable rise in H_(2) yield up to 84%.Despite the severe weight loss on Fe-promoted catalysts,high H_(2) yield was maintained due to the proper balance between the rate of CH_(4) decomposition and the rate of carbon deposit diffusion.Finally,incorporating 3 wt.%Fe into the 5Ni/10ZrAl catalyst resulted in the highest CO_(2) interaction,wide presence of reducible NiO-species,minimumgraphitic deposit and an 87%H_(2) yield.Our findings suggest that ironpromoted zirconia-alumina-supported Ni catalysts can be a cheap and excellent catalytic system for H_(2) production via DRM.展开更多
吝啬得令人发指,可又慷慨得叫人竖起大拇指,这个"铁公鸡"爸爸耐人寻味——Cheap.Cheap suit.Cheap date.It’s a dirty word,rife with negativeassociations.We hear the word cheap and we think,miser,Wal-Mart,something ...吝啬得令人发指,可又慷慨得叫人竖起大拇指,这个"铁公鸡"爸爸耐人寻味——Cheap.Cheap suit.Cheap date.It’s a dirty word,rife with negativeassociations.We hear the word cheap and we think,miser,Wal-Mart,something that’s going to fall apart.It’s an insult,almost any way you lookat it.展开更多
In May,dimly lit footage posted by a dubious Russian blog,English Russia,showing a Chinese office equipped with 10,000 phones,confirmed what many in tech mediahave warned about for years:Views and rankings all overthe...In May,dimly lit footage posted by a dubious Russian blog,English Russia,showing a Chinese office equipped with 10,000 phones,confirmed what many in tech mediahave warned about for years:Views and rankings all overthe internet are being manipulated by'click farms.'The high ratings of many apps on Android展开更多
文摘朋友对我讲了这么一件事:一次,在同外商谈生意时,翻译把'我们的产品物美价廉。'译成'Our products are of good quality and cheap.'当时外商就迷惑不解:good quality 的产品,怎么又 cheap 了呢?随之而来的便是一番解释,直到外商看见了产品,又得到了报价,这才放下心来。问题出在哪里?原来,cheap 不光指价格低廉,它还有其它的意思。先请看例句:Her socks looked cheap and nasty.她的袜子价廉质劣。
文摘INSPIRED by the Belt and Road Initiative,China＇s four-year-old blueprint for multinational trade and economic development, the China Trade Week （CTW）, is making its mark in Africa. Besides dispelling the misconception that Chinese manufacturers produce only cheap and low-quality items, the event is also a platform to introduce companies from different provinces in China.
基金financial support from the National Key R&D Program of China(No.2023YFA1507500)We also appreciate the general support provided by Prof.Armin Borner at Leibniz-Institute for Catalysis.
文摘The development of catalytic carbonylation reactions has increased considerably.Although many reviews/chapters/books on carbonylation reactions have been published,summaries on cheap metal-catalyzed catalytic carbonylation reactions of aryl halides and other chemical bonds with high dissociation energy C–Y(Y=O,N,H)are still very rare.Focusing on green and sustainable chemistry,this review summarizes and discusses the achievements on carbonylative transformations of aryl halides(C(sp^(2))–X)and strong bonds C–Y(Y=O,N,H)based on non-expensive metal catalysts(Co,Mn,Mo,Ni,Fe,Cu),photochemical and electrochemical systems developed in recent decades.
基金The authors would like to extend their sincere appreciation to Researchers Supporting Project number (RSP2023R368)King Saud University,Riyadh,Saudi Arabia.RK,NP,VKS acknowledge Indus University,Ahmedabad,for supporting research.Dr.Ahmed I.Osman and Prof.David W.Rooney wish to acknowledge the support of The Bryden Centre project (Project ID VA5048)。
文摘Developing cost-effective and high-performance catalyst systems for dry reforming of methane(DRM)is crucial for producing hydrogen(H_(2))sustainably.Herein,we investigate using iron(Fe)as a promoter and major alumina support in Ni-based catalysts to improve their DRM performance.The addition of iron as a promotor was found to add reducible iron species along with reducible NiO species,enhance the basicity and induce the deposition of oxidizable carbon.By incorporating 1 wt.%Fe into a 5Ni/10ZrAl catalyst,a higher CO_(2) interaction and formation of reducible"NiO-species having strong interaction with support"was observed,which led to an∼80%H_(2) yield in 420 min of Time on Stream(TOS).Further increasing the Fe content to 2 wt.%led to the formation of additional reducible iron oxide species and a noticeable rise in H_(2) yield up to 84%.Despite the severe weight loss on Fe-promoted catalysts,high H_(2) yield was maintained due to the proper balance between the rate of CH_(4) decomposition and the rate of carbon deposit diffusion.Finally,incorporating 3 wt.%Fe into the 5Ni/10ZrAl catalyst resulted in the highest CO_(2) interaction,wide presence of reducible NiO-species,minimumgraphitic deposit and an 87%H_(2) yield.Our findings suggest that ironpromoted zirconia-alumina-supported Ni catalysts can be a cheap and excellent catalytic system for H_(2) production via DRM.
文摘吝啬得令人发指,可又慷慨得叫人竖起大拇指,这个"铁公鸡"爸爸耐人寻味——Cheap.Cheap suit.Cheap date.It’s a dirty word,rife with negativeassociations.We hear the word cheap and we think,miser,Wal-Mart,something that’s going to fall apart.It’s an insult,almost any way you lookat it.
文摘In May,dimly lit footage posted by a dubious Russian blog,English Russia,showing a Chinese office equipped with 10,000 phones,confirmed what many in tech mediahave warned about for years:Views and rankings all overthe internet are being manipulated by'click farms.'The high ratings of many apps on Android
