摘要
Water is the most fundamental and important substance in nature.It has been intensively studied,but there is still much we do not know about it.The sustainable utilization and protection of water resources constitute one of the most formidable challenges to human beings in the 21st century.This is especially true for many developing countries,particularly China.
Water is the most fundamental and important substance in nature. It has been intensively studied, but there is still much we do not knowabout it. The sustainable resources constitute one utilization and protection of water of the most formidable challenges to human beings in the 21st century. This is especially true for many developing countries, particularly China.
