Cars that drive themselves are in development now, but a marketable product is a long way down the line.
无人汽车正在开拓中，但要拿出有销路的产品还有很长的路要走。
We plan to have an office in both cities - but that's down the road.
我们打算在两个城市都设立一间办公室，但是这是将来的事。
If you don't do your homework now, it'll be a problem down the road when you don't know the material for the exam.
如果你现在不做作业，当你不知道考试的资料时，将会是个问题。
I do want to get married, but down the road, not any time soon.
我不想结婚，但是将来会，不是近期。
Her doctoral degree is about three years down the road.
她在未来三年可以得到博士学位。
