同义词： outerwear overclothes
以上来源于: WordNet
As we age, the outer layer of tooth enamel wears away.
随着年龄增长，我们牙齿外层的釉质会慢慢地磨损。
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An externalized conductor occurs when the cable, or conductor, from inside the lead wears through the outer silicone insulation around the lead and appears outside the insulation body.
FORBES: St Jude Withdraws Older LV CRT Leads From Market
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