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重点讲解：
1. aim to do sth. 致力于；旨在；以…为目标；
We aim to help students make more informed career choices.
我们旨在帮助学生作出更有依据的职业抉择。
2. take care of 照顾；照看；看护；
She used to take care of me when I was a baby.
我还在襁褓中时，她曾经照顾过我。
3. speed up 加快(…的)速度；
Increasing gravity is known to speed up the multiplication of cells.
我们知道不断增加的引力会加速细胞的分裂。
4. set up 创建；建立；安排；组建；
He has just set up his own business but it will take him a while to get established.
他刚建立起自己的公司，但要站稳脚跟还得花上一段时间。
