例句:Kevin stopped to buy the evening paper from a news vendor.
凯文停下来向报贩买了一份晚报。
2.mainstream n.(思想或行为的)主流
例句:Their views lie outside the mainstream of current medical opinion.
他们的观点不属于当今医学界观点的主流。
3.impeachment n.弹劾
例句:The verdict resulting from his impeachment destroyed his political career.
他遭弹劾后得到的判决毁了他的政治生涯。
4.periodically adv.周期性地
例句:Economic crises recur periodically.
经济危机周期性地发生。
5.perform v.表演; 扮演
例句:He performed well under pressure.
他在压力之下表现得很好。