Then the doors opened and she disappeared inside.

VOA: special.2009.04.04

I don't know where that is, that disappeared on the blackboard, then putting the time equal to 1 second into this formula.

我不知道我写在哪儿了,已经不在黑板上了,然后把时间等于1秒代入方程

耶鲁公开课 - 基础物理课程节选

Then it slowly disappeared.

VOA: special.2009.07.22