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.The chemical composition of the melo shell is calcite and aragonite.美乐贝的化学成分是方解石和文石.Aragonite and magnesium calcite are more soluble than...
道格拉斯29岁，是个技术不错的拳击手，在以前的比赛中发挥不太稳定。Douglas was a 29-year-old journeyman fighter, erratic in his previous fights.定量供应很久以前就结束了饼干过剩的状况。Rationing had put an end to a surfeit of biscuits long ago.现在我们能公开谈论以前讳言不提的艾滋病问题。We can no...
可以用许多方法破坏寄生和寄生物之间的相互关系.The relationship between host and parasite can be disarranged in many ways.致病性这一术语是指寄生物引起疾病的能力.The term pathogenicity denotes the ability of a parasite to cause disease.我们只是在地面上爬行的寄生物.We're me...
He could no longer hold back convulsive laughter.他再也忍不住，前俯后仰地大笑起来。She kept trying to hold back her tears.她一直在试图抑制住眼泪。She closed her eyes tightly in a vain attempt to hold back the tears.她紧闭双眼，却无法忍住眼泪。...
奇迹就是看似不可能，却发生了。A miracle is something that seems impossible but happens anyway.1981年的预算促成了一场经济奇迹的出现。The 1981 budget was the springboard for an economic miracle.意大利的经济奇迹一直是个谜。The Italian economic miracle has always been a...
Were you surprised that his disease progressed so quickly?...他的病情发展得这么快，您是否感到意外？Once they had left Key Biscayne, Rogers and Laird quickly reversed themselves.罗杰斯和莱尔德一离开比斯坎岛,很快就变了卦.She quickly gulped her tea.她将茶一饮而尽。Young...
交通拥塞和污染traffic congestion and pollution今早6点30分时道路已经拥塞严重，尤其是M1号高速公路北行方向。Traffic was already very congested by six thirty this morning, particularly on the M1 northbound.我从来不容许以任何借口为我们港口的拥塞情形作辩护.I have never allowed the ex...
Mr. Forester. When do we expect you to come?请问几点钟光临?Seeing this, the forester also stopped.此人随之也停了下来.We look forward to welcoming you, Mr. Forester.福雷斯特先生, 我们恭候您的光临....