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重点讲解：
1. start with 开始时，一开始；
例句：Her illness started with a high fever.
她的病开始时是发高烧。
2. appeal to 对…有吸引力；使感兴趣；
例句：I hoped the festivities would appeal to her. But nothing did.
我希望节日的活动能吸引她，可还是无济于事。
3. as to 至于…；
例句：Many people are at a loss as to what to do in case of a real fire.
一旦真的发生火灾，许多人就不知所措，不知道该干什么好了。
4. be torn between 犹豫的；举棋不定的；
例句：Robb is torn between becoming a doctor and a career in athletics.
罗布在做医生还是当运动员之间痛苦抉择，左右为难。
n. 体育运动，田径
