I mean, it's good to have this knowledge off the top of your head.

我是说，把这些知识记在脑子里是不错。

What moving forward just off the top of your head.

你的头顶上正在向前推进什么。

What is the, Kyle, you would know this maybe off the top of your head.

这是什么，凯尔，你可能会想到这一点。

Yes, but off the top of your head, you don't know.

没错 但你并不能立刻想起来。

OK. Off the top of your head, what's a movie that you really liked?

托德：好的。在您的脑海中，您真正喜欢的电影是什么？

I've got a question which you might not know off the top of your head, but you probably have access to the interwebs.

我有一个问题，你可能一时想不起来，但也许你可以上网。

This allows you to prepare good answers and means you won't have to answer questions off the top of your head during the interview.

这让你准备漂亮的答案，意味着你不必在面试中难于回答问题。

I dare you to try and name as many Shakespeare plays as possible off the top of your head and put it in the comments below.

我敢打赌，你可以试着在脑海中说出尽可能多的莎士比亚戏剧的名字，并在下面的评论中写上。

If you don't know off the top of your head, well, then maybe you end up just searching on Wikipedia and you come across this list which says that the Nile is the world's longest — boom — and a video.

如果你无法立刻想出答案，那么你可能会在维基百科上搜索，你会看到这个列表，上面写着尼罗河是世界上最长的河流——砰——还有一个视频。