可惜，当后备箱盖弹开时，里面是空的。

Sadly when the lid of the boot sprang open, it was empty.

《柯林斯英汉双解大词典》

这树干里面是空的。

The tree trunk was hollow inside.

《牛津词典》

剧院几乎是空的。

The theatre was practically empty.

《牛津词典》

So, that's present in all of these moments, but--equally present-- I want to get back to this sense of blankness.

所以它在这些时候都被呈现了出来，而且是同等地呈现了出来-,让我们回头看看,这种空无一物的感觉。

耶鲁公开课 - 1945年后的美国小说课程节选

It just frees up space on the screen for more content and that may very well be a reasonable decision.

用来空出一些空间来显示更多的内容,那可能是一个非常合理的决定。

哈佛公开课 - 计算机科学课程节选

I'm gonna keep as part of each stock, it's history of prices, which we can initialize, well, I've initialized it as empty, but that's probably the wrong thing, right?

我会把股票的历史价格，作为每只股票的一部分，我们可以先对它的历史价格进行赋值，好了，我先给它赋了空值，但是这样做可能不对，是吗？

麻省理工公开课 - 计算机科学及编程导论课程节选