单词	aptychus
释义	aptychus noun ap·​ty·​chus ˈaptə̇kəs plural aptychi -ˌkī : a shelly plate usually of two pieces found in ammonites and regarded as an operculum Word History Etymology New Latin, from a- entry 2 + Greek ptychē fold
随便看	overkeep overkeeping overkeeps overkept overkill overkilled overkilling overkills overkind overkindly overkindness overking overkings overknee overlabor overlabored overlaboring overlabors overlabour overlaboured overlabouring overlabours overlace overlade overladed

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