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. on duty 上班；值班；
It was Mrs Dearden's day off, and Paul was on duty in her place.
那天迪尔登夫人休息，保罗替她当班。
3. push forward 推进；推行；
The modern education need to push forward uitilizing information technology into education and intergrating IT tech with subject curriculum.
现代教育要求大力推进信息技术在教学中的引用，促进信息技术与学科课程的整合。
4. so far 到目前为止；迄今为止；
This brought the total number of accidents so far this year to 113.
这使得今年迄今为止发生事故的总数达到113起。

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