重点词汇
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书架
bookshelf; bookcase; bookrack
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下层
lower levels; lower layer; lower level; lower stratum; underclass; lower strata; sublayer; substratum; substory; lower-level; subordinate
中英释义:
lower levels of a bookshelf
书架
bookshelf; bookcase; bookrack
下层
lower levels; lower layer; lower level; lower stratum; underclass; lower strata; sublayer; substratum; substory; lower-level; subordinate