I saw the back of his head.

我看到他的后脑勺了。

We saw him run into there. We saw the back of him from a distance.

我们看见他跑到了那里。我们从远处便瞧见了他的背影。

George looked up and saw the back of her neck, clipped close like a boy's.

乔治抬起头来，看着她的颈窝，她的头发很短，像个男孩儿。

I saw the back of her head and my funk just disappeared.

我看到了她的后脑勺， 我的恐惧消失了。

I mean, granted, I just saw the back of her head.

我的意思是，当然，我只看到了她的后脑勺。