So I thought I'd begin with a short note that one of your classmates sent to me earlier this week.

我从这周早些时候,你们其中一个同学给我的一张字条开始。

哈佛公开课 - 计算机科学课程节选

So, you will feel weightless for a short time or you'll feel your weight is little.

所以你会短时间的感觉到无重力,或者感到自己变轻了

耶鲁公开课 - 基础物理课程节选