river bed paving

例句：

1. 1. The constructioncrew was busy laying down the riverbedpaving stones.
   施工队正在铺设河床铺路石。
2. 2. The new road islined with riverbed paving stones,making it a popular tourist destination.
   新路两旁布满了河床铺路石，成为了一个热门的旅游景点。
3. 3. The riverbed paving stones are carefully placed toensure the smooth flow of water.
   河床铺路石被仔细放置，以确保水流畅通无阻。