There's naturally a lot of pressure on Milton to make this part of the simile beautiful and striking because he's echoing not just one epic poet, but essentially he's echoing just about every epic poet.

弥尔顿自然会感受到很多压力,必须得把这个比喻写的美丽动人,因为他不仅是在模仿一个诗人，实际上每个人史诗诗人都是他模仿共鸣的对象。

耶鲁公开课 - 弥尔顿课程节选

Normally I couldn't do that Vdp because this term would have p dV plus V dp, but we've specified the pressure is constant, so the dp part is zero.

一般情况下我不能这么写,因为这一项会包含pdV和，但是我们已经假定压强为常数，所以包含dp的部分等于零。

麻省理工公开课 - 热力学与动力学课程节选