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...
He persevered despite discouragement from those around him.尽管周围一片劝阻声，他还是锲而不舍。Attendance figures had been steadily dropping, creating a mood of doom and discouragement among theatre directors.上座人数一直持续下降，使得戏剧导演产生悲观泄气的情绪。Fa...
在我们背后传来一阵轻松爽朗的笑声.Behind us a light silvery laugh rang out.他带着十分爽朗的笑容向我们环顾了一下.He looked round upon us with a most agreeable smile.难得的清新爽朗的空气吹进了她的胸膛.Rare clean sweet air rushes into her grateful lungs....
As the domestic market becomes saturated, firms begin to export the product.由于国内市场饱和，各公司开始外销。You can't begin to imagine how much that saddens me.你都无从想象这让我有多悲伤。You can add ingredients to these desserts as they begin ...
The soldiers longed for their own hearths.战士想家.In the hearths the fires down and the meat stopped cooking.在壁炉的火平息和肉停止做饭.In the hearths the fires died down and the meat stopped cooking.在炉床中的火灾死下,而且肉停止煮....