重点讲解：
1. in order to 为了；以便；目的在于；
In order to transform their environment, he drew up the project with painstaking accuracy.
为了改造环境，他苦心孤诣地制订了这个计划。
2. up to date 迄今；到目前为止；
I have not received news from him up to date.
直到如今我还没有接到他的消息。
3. attribute to 把…归因于；把…归咎于；
The coach attributed the team's victory to training and practice.
教练把球队的胜利归功于平时的训练。
4. at present 目前；现在；眼下；
I don't need the dictionary at present.
我现在不需要这本字典。