词
;The mandibles are usually lost, the labrum is reduced to a narrow transverse sclerite, and the labium is a small flap ( though its palps retain quite large).
上颚消失，上唇退化为一条窄横
，
唇退化为一
（唇须发达）。
唇瓣The mandibles are usually lost, the labrum is reduced to a narrow transverse sclerite, and the labium is a small flap ( though its palps retain quite large).
上颚消失，上唇退化为一条窄横，唇退化为一（唇须发达）。
声明：以上例句、词性分类均由互
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