Sam All right. So, we'll move this up to the front in just a minute, but I'm going to explain how this experiment works and we'll do the calculation first before the excitement breaks out.

好的，这是她的女儿,被背带背她在胸前，这是Patti，Christie博士，好的，我们等会,会把它移到前面,但我要先解释下。

麻省理工公开课 - 化学原理课程节选

Sam used to be a river raft guy, a river rafting guide, so we would go do that.

萨姆以前是漂流队的指导员，所以我们可以玩那个。

与朋友们的回忆 - SpeakingMax英语口语达人