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重点讲解：
1. vote against 投票反对；
He would vote against it on principle.
他会根据原则投反对票。
2. back to back （胜利等）一个接着一个的，连续的；
He scored two home runs back to back in the 9th inning.
他在第9局连续获2分。
3. be accused of 指控；控告；
A former Finance Minister and five senior civil servants are accused of fraud.
一名前财政大臣和五名高级公务员被指控诈骗。
4. fail to do sth. 失败；未能够；未做成；
He failed to keep the appointment.
他未履约。
v. 预防，防止
