所以，她和她丈夫以及小儿子离开了德黑兰，前往伦敦。

So she, her husband and small boy departed for London.

youdao

在我回来之前，他已出发前往伦敦。（侧重于离开起点）

He had left for London before I came back.

youdao

在我回来之前，他已出发前往伦敦。（侧重于离开起点）

He had left for London before I came back.

youdao