Smooth traffic flow on the road.

道路交通顺畅。

youdao

youdao

The road was paved with smooth stone slabs.

道路用平整的石板铺成。

《牛津词典》

Ms. HOLIDAY: (Singing) Smooth road, clear day, but why am I the only one traveling this way.

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President GEORGE W. BUSH: I wish I could tell you that the violence is waning and that the road ahead will be smooth-it will not.

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