adj.穿用的；使疲憊的；磨損的
wear的現(xiàn)在分詞.
That is why the machine parts were wearing away during use. 那就是機(jī)器零件在使用過程中磨損的原因。
n.發(fā)誓
動詞swear的現(xiàn)在分詞形式.
