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单词	trench box
释义	trench box trench box, trench shield trench box A heavily braced box of wood or steel which can be moved along a trench bottom as excavation and pipe laying
随便看	drug delivery vehicle drug demand reduction drug demand reduction administrator drug demand reduction advisory committee drug demand reduction officer drug demand reduction program drug demand reduction task force drug dependence drug dependence research center drug dependency drug-dependent antibody drug design drug design and discovery drug design program drug development drug development, computer-assisted drug development process drug diminished swine dysentery drug discovery drug discovery and development drug discovery and development summit drug disease drug, disease, and drama free drug disposition drug distribution data

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