Starvation was a major threat on the left but not on the right, and the top priority on the left was to bank energy.

饥荒是左边主要的威胁,但不是右边的,左边的首要任务就是储存粮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The top priority on the right has become to spend energy.

而右边的则是消耗能量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But thankfully I also found in my trolling around this morning,something that is perhaps technically motivating and at least remains for those of you which is many of you who actually use Gmail, you might have seen a little advert in the top right hand corner recently saying new beta version of a little something called Gmail Priority Inbox.

幸运的是我今天早上在网上闲逛的时候,发现了一些东西,一些对还在使用Gmail的人来说,可能在技术上有吸引力的东西，你可能已经看到,其右上方有个广告说的是,新版本Gmail优先收件箱发布了。

哈佛公开课 - 计算机科学课程节选