They often involve the generation of what are called 'second messenger' molecules which carry the signal further into the cell.

过程中通常会生成一种叫做,第二信使的分子,将信号更深入地传递至细胞内部

耶鲁公开课 - 生物医学工程探索课程节选

So, second ionization energy simply means you've already taken one electron out, now how much energy does it take for you to take a second electron out.

第二电离能简单地说就是,在你已经拿走一个电子以后，再拿走第二个电子,所需要消耗的能量。

麻省理工公开课 - 化学原理课程节选

But it's amazing, that every year you find somebody coming up with a way of going around the second law and somehow convincing people who are very smart that this will work.

但是很令人惊奇，每年你都能发现,有人宣称找到了,绕过第二定律的方法,还不知怎么地就说服了,一些非常聪明的人,让他们以为这个真的管用。

麻省理工公开课 - 热力学与动力学课程节选

Some scholars have pointed out that in Book II of the Iliad in the section that we call, "The Catalog of Ships," The poet lays out just exactly how many warships came to Troy fromGreece, and just exactly how many came from each town.

有学者指出在《伊利亚特》第二卷,《船舶名录》这一章节中,诗人准确地列出了从特洛伊出发到希腊的,战舰的数量,而每个城镇又各有多少

耶鲁公开课 - 古希腊历史简介课程节选