dig a well;sink a well;dug well ;
例句:
Dig the well before you are thirsty.
渴以前就挖井.
Wealth is like running water, and giving like digging a well.
财富如流水, 布施如挖井.
Ground water is also obtained for human use by sinking wells.
人们也通过挖井来获取地下水以供使用.