内口纲 口器包藏于头腔内，不外露

entognatha  detail>>

内口纲

entognatha  detail>>

不外露

refrain from revealing to hold as secret or confidential  detail>>

头腔

the head cavity  detail>>

不外

not beyond the scope of; nothing more than; nothing but  短语和例子   不外两种可能。 there a...  detail>>

包藏

contain; harbour; conceal  短语和例子   大海包藏着许多秘密。 the sea contains many mysteries&nb...  detail>>

内口

internal opening internal orifice internal os  detail>>

外露

exposed exposure  detail>>

口器

mouthparts (of an insect); instrumenta cibaria; partes oris; trophi  detail>>

颅腔,头腔

coeloma cephalica  detail>>

乳头腔

papillary cavity  detail>>

头腔音

head tone  detail>>

腿口纲

merostomata  detail>>

网口纲

opening rope  detail>>

圆口纲

cyclostomata cyclostomes  detail>>

肢口纲

merostomata  detail>>

腔内

intracavity  detail>>

不外借

not for circulation  detail>>