The thermos, with the lid on top, It's not a open system your coffee is going to stay warm or hot in the thermos.

顶部盖了盖子的热水瓶，不是开系,你希望你的咖啡在热水瓶里面保持温暖,或滚烫。

麻省理工公开课 - 热力学与动力学课程节选

One way to say it is, every body will continue to remain in a state of rest or uniform motion in a straight line.

另外一种说法是,任何物体都会继续保持静止,或匀速直线运动的状态

耶鲁公开课 - 基础物理课程节选

The next day in class, I used that and I said to the students, "You know, the last thing in the world that I want you to think is that I experience a constant high or that you, by the end of the semester or the year-- it was a year course, you-- by the end of the year-- " will experience a constant high."

第二天上课时，我讲了这件事并对学生说，“我最不希望你们以为,我总是保持快乐，或者你们，在期未或学年未-,那门课程要讲一年，你们到学年未时-,会一直保持快乐“

哈佛公开课 - 幸福课课程节选