这条河就是在这里变窄的。

This is where the river narrows.

《牛津词典》

例如，在经常锻炼的人身上没有出现关节腔变窄的情况。

There was, for instance, almost no joint-space narrowing in active people.

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逐渐收缩变窄的一层使得它在功能组织上有了新意。

The tapering and narrow ground floor plate of the hotel generated different ideas in plan for the building's organization.

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