He believes that a virgin like the Lady is secure or safe from the violent attacks imagined by his younger brother.

他认为像那位女士那样的处女，在他弟弟想象的,暴力袭击中是很安全的。

耶鲁公开课 - 弥尔顿课程节选

Let's say that you're talking to your younger brother and sister.

假设你正在和弟弟妹妹说话。

It's important 课堂 - SpeakingMax英语口语达人

You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.

你们记得他们在树林中游荡,没有拿他们采摘的果子，小哥哥，也就是二哥哥，是最关心他妹妹安全的-,所以我想让你们看这篇文章。

耶鲁公开课 - 弥尔顿课程节选

Sergey The real people he was, sort of, with--certainly his brother, Sergey, Sergey way and were somewhat younger than him) -even Sergey is sort of invisible to him.

而真实地和他在一起的人，当然是他哥哥，和他接受相同的教育,则接受不同的教育）,但即使是Sergey对他的影响也很小。

耶鲁公开课 - 1945年后的美国小说课程节选

Milton's younger brother, Christopher, was already entering law school at this time, and it was clear, I guess, to everybody that John Milton, Jr. was not suited why that's the case.

弥尔顿的弟弟，克里斯多夫，在这时已经进入了法学院，我猜想，弥尔顿并不适合,我不清楚为什么）

耶鲁公开课 - 弥尔顿课程节选

So notice first here that the younger brother compares his sister's virginity to a miser's treasure.

所以首先注意这个小哥哥,他将妹妹的贞节与吝啬鬼的财富作比较。

耶鲁公开课 - 弥尔顿课程节选