flats
[f'læts]
n.
平地( flat的名词复数 );
（楼房的）一层;
降半音;
平面布景;
例句:
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It started a fire in a block of flats.
大火是从一幢公寓大楼烧起的。
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The rampant apartment blocks are full of unsold flats.
来自BBC
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Regrettably we have to house families in these inadequate flats.
很遗憾，我们不得不让住户挤在这些狭小的公寓里。
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Reno arrives, parks her bike on the flats.
来自NEWYORKER
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His mother looked ten years younger in jeans and flats.
他妈妈穿上牛仔裤和平跟鞋，看上去年轻了10岁。
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So what should you wear with your flats?
来自WSJ