1.carry out/perform/conduct /do/make an experiment 做实验
2.convert A into/to B把A转换成B
3.take the place of = replace取代,代替
in place of取代,代替(介词短语)
instead of代替,而不是(介词短语)
4.a quantity of + 不可数名词,谓语动词用单数
quantities of+可数名词复数,谓语动词用复数
quantities of+不可数名词,谓语动词用复数
5.owing to /thanks to /due to /because of由于…
6.he key to…的关键the answer to the question问题的答案notes to the text课文注释
an end to the meeting会议的结束the entrance to the building大厦的入口