居民应将垃圾分成四类——厨余垃圾、可回收垃圾、有害垃圾和其他垃圾。
Residents should sort their garbage into four groups kitchen, recyclable, hazardous (有害) and other waste.
他大四时，就已经拿到他第一个专利，在义肢承接余肢的接合处，使用了一系列的囊体来弥补个别余肢在形体上可能有的极大差异。
By his senior year he had been granted his first patent, for a socket interface that used a series of bladders to compensate for the wide variation in the shapes of different people's residual limbs.
每年四月，企鹅们历尽艰险，跋涉于南极冰面，行程70余英里（110公里），返回出生之地。
The penguins make the grueling journey across some 70 miles (110 kilometers) of Antarctic ice each April to return to the breeding grounds where they were born.
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