比如挖一个池塘，钻一口井或兴建护堤只能提供一些方便，但这有一个好处，它将持续数年-可能造福几代人。
Something like digging a pond, drilling a well, or building a berm may only provide a small benefit, but it's a benefit that will persist for years - potentially for generations.
用钻、挖或掘的方式打通如。
To form (a tunnel, for example) by drilling, digging, or burrowing.
可是他怎能如此高兴呢？我小时候，一旦没击中球，我就羞愧难当，觉得没脸见人，恨不得挖个地洞钻下去。
But how can he be so at ease? I would feel ashamed every time I missed a ball when I was at his age.
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