boulder clay是什么意思 boulder clay怎么读
boulder clay的英文翻译是什么意思，词典释义与在线翻译
Noun:- unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
boulder clay的相关资料
tillprep.直到 ... 为止conj.直到 ... 为止n.放钱的抽屉；备用现金；[地质]冰碛土(物)v.耕作
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