店主们已经用木板封住了他们的窗户。

Shopkeepers have boarded up their windows.

《柯林斯英汉双解大词典》

他已经把这张便条用图钉钉在了她的门上。

He had tacked this note to her door.

《柯林斯英汉双解大词典》

他已经开始建造一个狩猎用的小屋。

He'd already started construction on a hunting lodge.

《柯林斯英汉双解大词典》

All right. So jumping in to having established that, yes, particles have wave-like behavior, even though no, hey're not actually photons, we can't use that equation.

好的，我们已经承认了，粒子有波动性，虽然它们不是光子，我们不能用这个方程。

麻省理工公开课 - 化学原理课程节选

because it will give you an opportunity to say "I want to be sure that this is done, has been done"

因为用这个句型，你就能表达“我想确认这事会做到的，或者已经做到了。”

Make sure 课堂 - SpeakingMax英语口语达人

But we know already from week zero that computers ultimately represent all information with numbers, and if they want to represent letters inside memory, well what do they do or what do they use?

但是自从上周我们已经知道,计算机最终是用数字来表示所有的,信息，如果它们要描绘,在内存中的字母，它们该怎么做，用什么方式呢？

哈佛公开课 - 计算机科学课程节选