It's a bundle of nerves that allows communication between the two halves of the brain.

脑胼胝体是连接两个脑半球的神经。

We will be spending the next 21 days traveling all over the country and I'm a bundle of nerves.

我们将会用接下来的21天在中国旅行，我现在有些紧张。

I remember you were a bundle of nerves on your wedding day.

【nerve】我记得你在婚礼那天紧张极了。

But he was a bundle of nerves as he tried to bundle up the courage to make a clean breast of the fact that he had left the door open.

但他是一束神经，因为他试图鼓起勇气，把他把门打开的事实洗干净。