我们必须马上出发，克拉拉，因为太阳已经落山了。我们的导游马上就到。

We must soon start, Clara, for the sun is already low; our guides will be here shortly.

youdao

我们必须马上出发。

We must start at once.

《新英汉大辞典》

我们必须马上出发，否则我们开会就会晚了。

We have to start at once., or we'll be late for the meeting.

youdao

我们必须马上出发。

We have to start at once.

youdao

我们必须马上出发，否则我们将不能按时到达那里了，对吗？

We must start at once or we can't get there on time, can we?

youdao

我们必须马上出发，否则我们将不能按时到达那里了，对吗？

We must start at once or we can't get there on time, can we?

youdao