下次，当我们想在提供免费 WiFi 网络的公共场所使用笔记本电脑或智能手机时，请三思而后行或者在使用之前采取安全措施。

Next time, when we want to use our laptops or our smartphones in public places which offer free WiFi networks, please think it twice or take safe measures before using them.

youdao

在使用之前要测试所有的工具。

Then test all the tools before going live.

youdao

人们在真正使用之前就开始谈论。

People started talking about it before they could try it.

youdao

I have no idea what's here at the moment so I'm just going to draw a question mark because that memory might have been used previously for some other purpose, but we know it's currently available to us so we have four bytes of memory.

我不知道在此刻这里是什么,所以我画一个问号，因为那块内存可能在之前,为其它的目的而使用过，但是我们知道它可以为我们所使用,这样我们就有4个字节的内存。

哈佛公开课 - 计算机科学课程节选

Up until then they had been using the old stadium, which now has been turned into a park.

在那之前，他们一直使用旧体育馆；现在旧体育馆已经成为一个公园了。

布朗克斯的景点 - SpeakingMax英语口语达人

printf So here I'm culling printf in a loop again and again, but I'm literally overwriting the previous thing that I wrote.

所以这里我一次次地在循环中使用，但是我逐行地覆盖了我之前所写的东西。

哈佛公开课 - 计算机科学课程节选