了解三氯 乙醛 的毒性和致突变作用.Acute toxicity test , mutation test and single - cell gel electrophoresis ( SCGE ) were used.三氯乙醛是无色挥发性的液体,带有刺激性很强的气味,在97.7℃沸腾.Chloral is a colorless, volatile liquid with a very penetrating odor and bo...
更有甚者, 不论是西班牙的砌砖匠还是华尔街的交易员, 很多昔日的就业岗位会一去不复返.Moreover , many of yesterday's jobs, from Spanish bricklayer to Wall Street trader , are not coming back....
Filmmaking was transformed by digital editing, digital f/x, and digicams.数字剪辑、数码特效以及数码摄像机改变了电影摄制方式。Birgit was a popular actress with half a decade of filmmaking behind her.比吉特曾是一位当红女演员，有着五年的从影经历。The art of filmmaking nev...
他们无法把重型迫击炮移过那片沼泽地.They could not move their heavy mortars over the swampy ground.在沼泽地,该军受到蚊子的困扰.In the swamp the army was beset by mosquitoes.我们不得不穿过那片沼泽地.We had to cross the marshes....