How many kilometres by train is it from Nanjing to Wuhan?坐火车从南京到武汉有多远？

It is …from …to ….表示“从…到…有…远”。It 表示“距离”，有关表示距离的句型可有多种。例如：

It is five kilometres from my house to our school.

从我家到学校有五公里。

The school is two kilometres from here.

学校离这儿有两公里远。

It's about ten kilometers away.

有十公里远。

The town is tree hours by bus from here.

从这儿坐汽车去城镇有三个小时。

★　So far,no man has travelled farther than the moon.

So far,no man has travelled farther than the moon.到目前为止，没有人去过比月球更远的地方。

So far 表示“到目前为止”，有作状语。例如：

So far,we have studied English for three years.

到目前为止，我们已经学习了三年的英语了。

We haven't got any news yet,so far.

到目前为止，我们还没有得到任何消息。