词汇	silica sand deposit
释义	silica sand deposit 硅砂矿床
随便看	essential laryngitis tablet essential laryngitis tablets essential legal system essential legitimacy essential liberty essential limit essential listening essential living standard security finance essential living standard security system essential load essential logistic supply center essentially essentiallyas essentially bounded essentially bounded function essentially bounded functions essentially complete class essentially complete class of decision rule essentially complete class of decision rules essentially comprising essentially comprising cement essentially convergent sequence essentially derived variety essentially equal essentially equivalent