重点讲解：
1. account for （数量或比例上）占；
Domestic consumption accounted for 40 per cent of overall growth, she estimated.
她估计，国内消费占了总体增长的40%。
2. in terms of 在…方面；从…角度看；根据…来说；
Some college courses are graded in terms of either a pass or a fail.
有些大学课程按及格或不及格打分。
3. contribute to (为…)做贡献；
The running of schools by non-governmental sectors also contributed to the development of education.
社会力量办学也为发展教育事业作出了贡献。
4. thanks to 幸亏；归因于；
Thanks to your help, we accomplished the task ahead of schedule.
亏得你们帮忙，我们才提前完成了任务。