单词	Placuna
释义	Placuna noun Pla·​cu·​na plaˈkyünə : a genus of large flattened tropical bivalve mollusks (order Filibranchia) with extremely thin nearly transparent shells that is related to Anomia but sometimes made the type of a separate family see windowpane oyster Word History Etymology New Latin, from Greek plak-, plax flat surface
随便看	optime optimes optimeter optimisation optimisation, optimise optimisations optimise optimised optimiser optimisers optimises optimising optimism optimisms optimist optimistic optimistically optimists optimity optimization optimizations optimize optimized optimizer optimizers

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