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2020-11-24 16:39  views:460  source:小键人537827    

开个船坞或开条运河,把水引到船
底下来。于是我又着手这项大工程。一开始,我就进行了一些估算:看看运河要挖多深多宽,怎样把挖出来的土运
走。结果发现,若我一个人进行这项工程,至少要花十至十二年。因为河岸很高,达二十英尺。最后,我不得不放
弃这个计划,尽管心里很不愿意。
这件事使我非常伤心。到这时我才明白--虽然为时已晚--做任何事,若不预先计算一下所需的代价,不正确估计一
下自己力量,那是十分愚蠢的!



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去打字就可以设置个性皮肤啦!(O ^ ~ ^ O)