如果工作完成了，我们可以提前两小时出发。

We can leave two hours earlier if the work is completed.

youdao

我们必须考虑到交通堵塞问题，所以我们还是提前半个小时出发为好。

We must make allowance for the traffic, so let's start half an hour earlier.

youdao

第二天早上，他们又出发了，花了好几个小时才到达梅恩费尔德。

The next morning they started off again, and it took them many hours before they reached Mayenfeld.

youdao