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keystone的復數(shù)形式為：keystones...
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n.重點，要旨，基本原理，拱心石...
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Quantitative measurements of one sort or another serve as the keystone of engineering practice.定量測定一種或多種成分是環(huán)境工程中的重要項目.The keystone to any marriage is one word: " WE ".任何婚姻的基石只有兩個字: “ 我們 ”.Advancing suburban assurance is ...
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keystone的音標：keystone的英式發(fā)音音標為：['ki:st??n]keystone的美式發(fā)音音標為：['kisto?n]...
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Advancing suburban assurance is the difficulty and keystone of domestic insurance enterprise.發(fā)展農(nóng)村保險是我國保險業(yè)發(fā)展的難點和重點.Quantitative measurements of one sort or another serve as the keystone of engineering practice.定量測定一種或多種成分...