In some cases, the back of the head could be more expressive than the front, in which case this is your opportunity and I wish you luck.

有些时候,后脑勺确实比正脸更有表现力,这才是你们的机会,祝你们好运

耶鲁公开课 - 基础物理课程节选

I think it's in your brain, the back of your head.

应该是在大脑中，后脑勺那里。

耶鲁公开课 - 弥尔顿课程节选

Only the back of your head will be seen.

观众们只能看见你的后脑勺

耶鲁公开课 - 基础物理课程节选