重点讲解：
1. be interested in 感兴趣的；有兴趣的；关心的；
He was interested in all aspects of the work here.
他对这里工作的所有方面都感兴趣DhGK8nWz(S。
2. allow sb. to do sth. 允许；容许；准许；
The course allows students to progress at their own speed.
本课程允许学生按各自的速度学习7v~J~SL8n*=pWO(。
3. if you like （用于非正式地提出或同意建议）如果你乐意的话；
You can stay here if you like.
如果你愿意，可以呆在这里=Q_|aaCUh~wQP。
4. derive sth. from... 获得；取得；得到；
Mr Ying is one of those happy people who derive pleasure from helping others.
英先生属于那种助人为乐的快活人0WB)lhI&p^。