The reuseratio of water resources is increased by enlarging the supplement storage capacity of underground aquifer and based on the three related water transfer law.
依循三水转化规律，人工强化回灌，加大地下含水体的反调节能力，大大提高水资源的重复利用率。
2
The effect of raw material ratio, esterification time, the quantity of the catalyst and reuse of catalyst on esterification rate was discussed.
讨论了原料配比、酯化时间、催化剂用量及其重复使用次数对酯化率的影响。
3
The reaction rate, concentration, solvents, ratio, Catalyst are dealt with respectively and the reuse of waste liquors is also cared about.