英语词汇“a closed book”的读音、翻译、释义、用法及例句-开邑网

词汇	a closed book
释义	a closed booka closed book1.■谜, 未揭开的秘密,高深莫测的事物
随便看	wash (one's) dirty linen in public wash oneself wash one's hands wash one's hands of wash one's hands with invisible soap and imperceptible water washout wash out wash-out washout coefficient wash-out developer washout emitter wash-out machine wash-out method in nephrotomography wash-out method in nephrotomo-graphy wash-out pipette wash-out plug washout plug washout plug hole flange washout repair of steam locomotives wash-out structure wash out test washout thread washout valve wash-out valve wash over

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