重点讲解：
1. account for （数量或比例上）占；
例句：It should at least account for 50% of the total investment.
至少占投资总额的50%。
2. according to 据…所说；按…所载；
例句：According to the newspaper, the congressman is murdered.
根据报纸所述，议员是被谋杀的。
3. result in 导致；引起；造成；
例句：Many repetitions can result in collapse.
多次反复就能导致断裂。
4. come up with 想出，提出（计划、想法等）；
例句：I wish I can come up with a good idea.
我希望能想出好主意。
5. compared to 与…相比；和…比起来；
例句：Compared to here, all that wine and food are so cheap.
与 这儿比起来，那 里的酒与食物都很便宜。
6. shed light upon 使（某事）显得非常清楚；使人了解（某事）；
例句：A combination of these two theories will surely shed more light upon meaning construction of texts.
二者的结合有助于我们更好地阐释语篇的意义建构过程。
