So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.

也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。

麻省理工公开课 - 热力学与动力学课程节选

If Israel doesn't fulfill her obligations by obeying God's Torah, his instructions, and living in accordance with his will, as expressed in the laws and instructions, then God will not fulfill his obligation of protection and blessing towards Israel.

如果犹太人不履行自己的责任,遵守上帝的教训和旨意，按照他的意愿生活，就像律法和训诫中规定的那样，上帝也将不履行他的义务,保护，怜悯犹太人。

耶鲁公开课 - 旧约导论课程节选