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

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

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