Calcium carbonate occurs in the allomorphs calcite and aragonite.同质异晶的方解石和文石中含有碳酸钙.And some calcite - secreting organisms also add magnesium to the mix.有些分泌方解石的生物,会在分泌物中加入镁.The chemical composition of the melo shell is c...
In her view, war is simply a legalised form of butchery.在她看来，战争只不过是一种合法化的屠杀。They were the years that Fifa , the world governing body, legalised hope.在那些年里, 国际足联一直致力于把这种机会合法化.In surveys, more than 80 % of Britons say assi...
They okayed the proposal yesterday.昨天他们批准了这项提案.His ear okayed the sounds as the engine warmed up.他的耳朵听出发动机预热时发出的声音是正常的.Smith's report was not officially okayed by the War Department for Release until July 9.史密斯的报告于7...
I had to sit at home twiddling my thumbs, waiting for the phone to ring.我只好在家里干坐着等电话响。So must we sit back and twiddle our thumbs?难道我们就只能在这儿无所作为?They gave Lavalle the thumbs-up sign.他们对拉瓦列竖起了大拇指。When we need you help, all...