;1.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
退化为一条窄横
，
退化为一小（须发达）。
词条纠错
X
labium
n. 
,阴,
瓣
,阴,瓣声明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件
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labiovelar, labiovelarize, labioversion, labite, labitome, labium, lablab, labor, labor agreement, labor contract,
