A: You seem to be very tired.

A：你看起来很累啊。

B: Yes, I have been working for eight hours.

B：是的，我已经工作了8个小时了。

A: Why don't you join us to go out for a walk?

A：要不要和我们一起去散散步?

B: No, really. I'm not in the mood for it.

B：真的不行，我没那个心情。