You can smoke in the entrance hall. Or outside, of course.

你可以在门厅里吸烟。当然，你也可以在室外吸烟。

It doesn't matter.

不要紧。

And now I'm telling you I can't manage this Friday.

我正要告诉你我星期五没办法（出来）。

They don't get enough air.

（那样）鱼得不到充足的空气。

I feel like going to a museum. It's too wet to go walking around London.

我想去博物馆。我们又不能绕着伦敦到处走走，地太湿了。

We can't go to the public parks or swimming pools.

我们不能上公园或是去游泳池。