And yet he said we are focusing too much on cultural differences and he added not because there are no cultural differences.

然而他说，我们对文化差异的关注太多了,他补充道不是因为没有文化差异。

哈佛公开课 - 幸福课课程节选

Since it's isolated, no heat is added.

因为它是与环境隔绝的，因此没有热量交换。

麻省理工公开课 - 热力学与动力学课程节选