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重点讲解：
1. decide on 决定；选定；
Both of your suggestions are persuasive and I cannot decide on which I will take.
你们的两个建议都很合理，我无法决定选择哪一个。
2. deal with 处理；应付；与…打交道；
They agreed to press for the conference to deal with the problem.
他们同意敦促大会处理这个问题。
3. ward off 避开，躲开，防止(危险、疾病等)；
He took vitamins to ward off head colds.
他吃维生素以避免伤风。
4. shed light on 使（某事）显得非常清楚；使人了解（某事）；
Using two kinds of models, we can shed light on the some behaviors of stock returns.
利用这两种模型，可以解释股票回报的某些异常行为。
adj. 杰出的，显著的，突出的
