例句:I regret to inform you he died as a consequence of his injuries.
我很遗憾地通知你，他因伤势太重不治身亡。
2.in advance 提前
例句:Everything has been fixed in advance.
一切都是事先确定好了的。
3.chemical reaction 化学反应
例句:There was a chemical reaction of the lime with the ground water.
石灰与地下水发生化学反应。
4.fold up 撒手；折叠
例句:This is a well designed easel which folds up quickly and neatly.
这个画架设计得很好，可以迅速而整齐地折叠起来。
