我想有科学家正在尝试这样做，我希望他们能成功，这样世界会变得更干净，不是吗？如果他们发明一种东西，让我们每天只睡一两个小时，那就太好了。

I guess there are scientists right now trying to do that, and I hope they'll succeed because the world would be a much cleaner place, wouldn't it? I think it will be great if they invent something so that we only have to sleep for one or two hours every day.

youdao

这很好。如果你能在世界杯前恢复健康那就太好了。

That's terrific. It would be great if you could get back in shape in time for the World Cup.

youdao

如果您能作为我们的贵宾来参加论坛，那就太好了。

It would be perfect if you could come, as our guest of honor, to the forum.

youdao

But I would really appreciate it if you flew lower, Superman.

但是如果你能飞得低一点，那就太好了，超人。

I'm afraid of 实战 - SpeakingMax英语口语达人