Bed material samplers, as first developed , may be divided into three types.最初的河床质取样器有三种类型.In this paper the performance of two kinds of samplers sintered metal filter is evaluated.本文介绍温、湿度变化对两种改进型被动式活性炭累积氡采样器吸附性能的影响....
Many refugees have fled to safer areas.许多难民已经逃往了更安全的地方。safer and more liveable residential areas更安全和更适于居住的住宅区Tests have shown that these new tyres are significantly safer.试验表明这些新的轮胎要安全得多....
Gail was silent for a moment, regarding Harry with his steady gaze.盖尔镇定地注视着哈里，沉默了片刻。He was firm and steady unlike other men she knew.他坚定可靠，和她认识的其他男人不一样。It's been hard to get a steady fix on what's going on.要对正在...
Silver - coated carbonyl iron powder was prepared by using electroless plating method.用化学镀法,甲醛为还原剂,制备镀银羰基铁粉.The p - chlorophenyl isocyanate is synthesised by carbonyl chloride and p - chloroaniline . The yield is 90 %.采用...
For my part , I cannot keep from uttering an exclamation of surprise!我那时是惊奇地叫了一声的!They departed without uttering a word.他们一言不发地离开了。Seconds after uttering the fateful words ‘this is easy’, he crashed.说了“这很容易”这句预言性的话后几秒钟，他...