"And the audience lets you know in real time exactly how they feel about your performance.

VOA: standard.2010.07.01

Know what you've already tried, don't waste your time trying it again.

记住你已经尝试过的错误，不要再次浪费你的时间。

麻省理工公开课 - 计算机科学及编程导论课程节选

In order to attend, you must know the date and the time. You can ask your friend, "When is your wedding?"

为了能够出席，你必须知道具体的日期和时间，你可以问你的朋友，“When is your wedding？”

When 课堂 - SpeakingMax英语口语达人

I wish we had time for your questions but I know Tal has a lot of great stuff for you today.

很希望有时间回答你们的问题,但Tal准备了很多精彩内容。

哈佛公开课 - 幸福课课程节选