从中提取的松香和鞣酸是化学工业上很需要的.The risin and tannin that can be extracted from it are sought by the chemical industry.从3点钟以后,它们就燃烧着松香.From three o'clock onward they would be burning resin.在实验室内用一 步法 合成了松香改性壬基酚醛树脂.Rosin modifi...
How do acids react on metals?酸对金属会起什么样的化学反应?By this mechanism, new phosphatides containing the fatty acids of phosphatidyl choline may be prepared.根据这个原理, 可以制备含有磷脂胆碱脂肪酸的新磷脂.Acylglycerol ( glyceride ) An ester of glycerol...
Mother and son lost contact when Nicholas was in his early twenties.尼古拉斯20岁出头的时候母子就失去了联系。It was paid to her in greenbacks -- three twenties, six tens, and six fives.这份薪水是用绿色钞票付给她的 -- 三张20块, 六张10块, 还有六张5块.It was written i...
船员们在50节的大风与滔天巨浪中深陷困境。The crew are in serious trouble in 50-knot winds and huge seas.滔天巨浪盖过礁石.Waves mountain - high broke over the reef.那艘船淹没在滔天巨浪中.The ship sank in mountainous seas....
通常法院对这种向饭店勒索的要求均予驳回.Usually the courts dismissed such claims with costs for the hotel.反情报 、 恐怖主义 、 报复及勒索的特殊专家.No : SPECTRE . Special Executive for Counterintelligence, Terrorism, Revenge and Extortion.许多黑帮以勒索的形式收取保护费.Man...
我们现在可以非常清楚地听到他们沉重的脚步声。We could now very plainly hear their heavy tread.我的心怦怦直跳。脚步声已停在我的门外。My heart was hammering. The footsteps had stopped outside my door.所有的人都竖起耳朵听楼梯上传来的脚步声。All ears were cocked for the footsteps on th...