[mass noun]reluctance to work or make an effort; laziness
不愿工作(或努力);懒惰
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he should overcome his natural sloth and complacency .他应当克服自己天性中的懒散和自满。
a slow-moving tropical American mammal that hangs upside down from the branches of trees using its long limbs and hooked claws
树懒。
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