outlook
n. 景色, 景致; 观点; 见解;展望; 前景
1.I have a good outlook from my bedroom.
我的卧室有很好的窗景。
2.He has a broad outlook on life.
他的人生观十分豁达。
3.The outlook for the economy is bright.
经济前景光明。
participant
n. 参加者, 参与者
联想：participate v.参加，参与
participant n. 参加，加入
1.She is an active participant in this activity.
她积极参与这项活动。
2.He didn't take part in the meeting, so he was not participant.
他没有参加这次会议,所以他不是参与者。
3.He is an active participant in the civil rights movement.
他是人权运动的积极参加者。
percentage
n. 百分比, 百分率;比例
辨析：percent表示“百分之...”相当于“%”，其前往往是一个具体的数字，percentage表示“百分比，百分率”，其前不能是一个具体的数字，只能被high，low等形容词
1.Television attracts a large percentage of the people.
电视吸引了大部分观众。
2.What is the percentage of nitrogen in air?
空气中所含的氮的比例是多少?
3.What percentage of your college expenses did you earn?
你读大学的开支，有百分之几是你自己挣的？
performance
n. 演出, 表演;履行, 执行;表现, 行为, 成就; 性能, 工作情况
1.The pianist gave a fine performance.
钢琴家演奏得很出色。
2.He is very conscientious in the performance of his duties.
他非常认真地履行职责。
3.His performance in the exams was not very good.
他考得不很好。
4.Are you satisfied with the performance of your new car?
你对你新车的性能满意吗?
