So we've now whittled this problem down into half and so we can literally and dramatically throw half of the problem away.

如此一来,我们就把这个问题简化了一半,我们可以大胆的扔掉另一半。

哈佛公开课 - 计算机科学课程节选

There is this building and it's going to be 15 meters high, and I'm going to throw something and it's going to go up and come down.

这是一栋大楼,它有15米高,我会抛出某个物体,它将先上升后下降

耶鲁公开课 - 基础物理课程节选

That means, if you are going in a plane and you throw something up in the air, it seems to be going up and down to you.

也就是说,如果你在飞机中,你向空中扔出一物体,它也许会相对于你上下运动

耶鲁公开课 - 基础物理课程节选