氨的合成主要经过四道工序.There are four major steps in ammonia synthesis.试计算氮在尿素及硫酸氨的质量百分率.Calculate the percentage by mass of nitrogen in urea and ammonium sulphate.这种肥料经过化验表明氨的含量很高.Tests of the manure showed a high ammonia content...
We know some sex offenders dupe the psychologists who assess them.我们知道有些性犯罪者会愚弄给他们做测评的心理学家。The psychologists insist, however, that they are not being prescriptive.然而，心理学家坚称他们并非一味灌输。However, psychologists distinguish betw...