1.As a consequence 因此；结果

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。