It decreases. If you're still not completely up on the periodic trends, that is stuff that's going to be on the first exam, so make sure that you're able to do this without taking too much time to think about it.

它会降低，如果你还没有完全掌握周期性规律，而这是第一次考试要求的内容，因此请务必做到不用,想太久就能做到这点。

麻省理工公开课 - 化学原理课程节选

If you never meditate before, this is a wonderful opportunity to do it for the first time.

如果你从没冥想过，这是你们尝试的好机会。

哈佛公开课 - 幸福课课程节选

What I'd like to do--and this will be the first time I've the clicker thing in the class so let's try out this little quiz and see how it works.

我想要--这是我第一次,在课上使用表决器,所以我们先做个小测试看看效果如何

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And then finally, as you know, the first concept sheet is due next week, and any of those who were here for the first time can go to the lecture notes for last week and it gives a detailed description of how to do the first concept sheet.

最后,第一篇论文的截止日期是下周,新来的同学,可以翻阅上周的讲课笔记,对于如何做第一篇论文,里面有详细的说明

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选