当我讲演示技巧课程开场时，我面对的听众中有些比较紧张，不敢和我眼神接触。
When I open our introductory presentationskills course, I’m speaking to people who are feeling pretty apprehensive. Someare so nervous and shy they won’t make any eye contact with me.
但是由于目前高校教学资源比较紧张，对课程的修读人数、修读务件都有限制，在选课筛选中加入公平算法是非常必要的。
However since the scarcity of teaching resources, the number and the conditions of students who take the courses are restricted, therefore, it is necessary to use fair algorithm in this case.
但是由于目前高校教学资源比较紧张，对课程的修读人数、修读务件都有限制，在选课筛选中加入公平算法是非常必要的。
However since the scarcity of teaching resources, the number and the conditions of students who take the courses are restricted, therefore, it is necessary to use fair algorithm in this case.
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