backs
n.
背( back的名词复数 );
背面;
（椅子等的）靠背;
后部;
v.
（使）后退， （使）倒退( back的第三人称单数 );
支持;
作…的衬里;
（用证据或理论来）证实（一种理论或主张）;
例句:
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The two women lay on their backs, not stirring.
两名妇女一动不动地仰面躺着。
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We cannot make this minority a convenient excuse to turn our backs.
我们不能拿少数这几个人作为一种方便的借口而对此置之不理。
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Strong leather tabs are...fastened to the backs of the...volumes.
来自Daily News
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He worked the room like a politician, gripping hands, and slapping backs.
他又是握手，又是拍背，像个政客一样把一屋子的人都笼络了一番。
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Have them turn their backs and do it again.
来自NEWYORKER
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The European Parliament also backs tougher hedge fund regulation.
来自VOA