cavity
cavity(pl. -ies)- an empty space within a solid object, in particular the human body
(尤指人体等固体物的)腔,洞
the abdominal cavity.
腹腔。
■a decayed part of a tooth
龋洞
派生cavitaryadjective语源- mid 16th cent.: from French cavité or late Latin cavitas, from Latin cavus 'hollow'
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