挖井是一件苦差事。
他们需要喝水的时候，就会开始挖井。
知识的积累如同用针挖井。
The accumulation of knowledge like digging a well with a needle.
人们也通过挖井来获取地下水以供使用。
Ground water is also obtained for human use by sinking Wells.
我已经在外邦挖井喝水。
I have dug Wells in foreign lands and drunk the water there.
就拿挖井这件事来说。
就拿挖井这件事来说。
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