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...
在我弟弟的高中毕业典礼上，学生们朗诵了一首诗。At my brother's high school graduation the students recited a poem.这首诗再怎么晦涩，至少有一点是清楚的。Whatever its obscurities, the poem was clear on at least one count.这些诗激发了一代又一代孩子的想象力。These poems have help...
We tend to meet up for lunch once a week.我们往往每周共进一次午餐。Somalia, pop. 7.9 million, income per head about £1.60 a week.索马里，人口790万，人均收入大约每周1.60英镑。The news programme goes out four times a week at peak time.这档新闻节目每周在黄金时段播出4次。...
They jollied her into going with them.他们哄得她与他们一起去.They jollied her into giving them a song.他们哄得她给大家唱了支歌.They jollied the little girl into going with them.他们哄得那女孩跟他们一起去....
It is food that the afflicted want now.受苦的人们现在需要的是食物。About 40% of the country's population is afflicted with the disease.全国40%左右的人口患有这种疾病。A terrible restlessness that was like to hunger afflicted Martin Eden.一阵可怕的、跟...
These reactions can conserve three of every four carbons diverted to glycolate by forming triose.这些反应能把四分之三的乙醇酸的碳保存在三碳糖中.Glycolate has long been recognized as an early and important product of photosynthesis.乙醇酸早就被认为是光合作...