Life is not a man-made canal and we can not be confined to a few fixed channels.

生活不是一条人造的运河，不能把它禁锢在几条规定好的河道之中。

youdao

On June 17, a 200 meters man-made canal designed by students in Cambriage was dismantled.

6月17日，剑桥大学校园内一条200米长的人工运河被拆除。

youdao

It's a bit like asking "How deep is the river?" Unless it's a man-made canal, a river's depth varies from place to place and time to time.

好比你问“这条河有多深”，除非是人工运河，否则其深度会因地点和时间变化而不同。

youdao

The key was not to try to dig a Suez-type of canal, a great sea-level trench from ocean to ocean, but to create a lock-and-lake canal, where the ships are lifted up by a series of locks to a man-made lake, and then they sail across that lake, and then they are set back down on the other side by another series of locks.

FORBES: Fact and Comment

Today, the railway still ferries valuable cargo across the Canal Zone including curious day-trippers on jungle-thick journeys past man-made lakes, locks and causeways.

WSJ: Travel: It's a Jungle Out There | The Panama Canal Railway