出生在一个有三个兄弟的家庭，大卫被教育要重视分享意识。

Born into a family with three brothers, David was brought up to value the sense of sharing.

youdao

三个兄弟进来了，杀死了蓝胡子。

The three brothers came in, and killed Blue Beard.

youdao

我三个兄弟中的两个最后也在商店打工。

Two of my three brothers ended up working in the store, too.

youdao

And he responded, "No, but I would gladly give my life for three brothers or five nephews or nine first cousins.

他回答，不，但我乐意把生命给三个兄弟,或5个侄子或九个堂兄弟姊妹。

耶鲁公开课 - 心理学导论课程节选

From the standpoint of your genes, you dying for the life of three brothers is an excellent compromise 50% because the genes replicate by fifty percent more.

从你自身基因的角度看，你为了三个兄弟牺牲自己,是非常好的折中,因为基因复制超过。

耶鲁公开课 - 心理学导论课程节选