Please think about it again and try to get online to figure more out about the test requirement and how Americans' view points before your decision in paying for it.

请在决定付钱报名之前认真了解并上网查明考试要求和美国人的观点和意见。

youdao

And these verbal descriptions lead to some pictures that I put up and I'll put up again about how you might try to accomplish something like run an engine or move heat from a colder to a warmer body.

这些言语的描述有助于你们理解我讲过的,而且还要再讲的一些物理图像,比如一台发动机,是怎么运行的,或热怎样从冷的物体传到热的物体。

麻省理工公开课 - 热力学与动力学课程节选