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下唇:一种唇状结构,如组成某些无脊柱动物的下唇基节,尤指昆虫。
A liplike structure, such as that forming the floor of the mouth of certain invertebrates, especially insects.
youdao
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下唇:一种唇状结构,如组成某些无脊柱动物的下唇基节,尤指昆虫。
A liplike structure, such as that forming the floor of the mouth of certain invertebrates, especially insects.
youdao