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- Rocks rolled down the hillside. 岩石沿着山坡滚下来。
- Rocks and stones rolled down the hillside. 石块沿山坡滚下。
- As the rock rolled down the mountainside, it gathered momentum. 石头滚下山时，它的动量增加。
- At the moment heavy rocks and stones rolled down the hillside. 这时，沉重的石块沿着山坡滚了下来。
- Stones rolled down the hillside. 石头沿山坡滚下。
- Rocks and stones were rolling down the hillside. 岩石和碎石沿着山坡滚下。
- The great rocks rolled down the mountainside. 巨石滚下山腰。
- Small stone rolled down the hillside as they run up. 他们跑上山坡，同时有些小石子滚了下来。
- Small stones rolled down the hillside as they ran up. 他们跑上山坡; 同时有些小石子滚了下来.
- As the rock rolled down the mountainside,it gathered momentum. 当岩石沿着山坡滚下时，冲力便愈来愈大。
- As the rock rolled down, it gathered momentum. 岩石滚下山坡时，冲力愈来愈大。
- With a sudden thrust, they sent the boulder rolling down the hillside. 几个人一铆劲儿，就把大石头撬下坡去了。
- The torrent scoured a gully down the hillside. 那激流顺山坡而下冲出一条水沟。
- The torrent scoured a channel down the hillside. 急流沿着山坡冲出了一条沟。
- A black car rolled down the hill. 一辆黑色汽车从山坡上翻滚下来。
- The torrent scoured a gully down the hillside . 那急流顺山坡而下冲出一条水沟.
- The houses straggled down the hillside. 房屋散布於山坡之上。
- The stone rolled down the hill by gravity. 石头在重力作用下向山下滚去。
- As the rock rolled down the mountainside, it gathered momentum 石头滚下山时，它的动量增加。
- The floods rolled down the valley. 洪水沿山谷奔腾而下。
