Now, this is the chemistry lab. Have you been in this lab before?

好啦，这是化学实验室。你们以前到过这个实验室吗？

Of course.

当然可以。

No, thanks. I've had enough.

不啦，谢谢。我已经吃饱了。

OK. I've got a better idea. Why don't we do it together?

好，我有了一个更好的主意。为什么我们不一起干呢？

Where are you travelling to, Gary?

卡里，你打算旅行到哪里呢？

The characters on the paper were white, and the rest of the paper was black.

纸上的汉字呈白色，其余部分成黑色。