roll down

• 滚下；从…滚下来；顺流而下：

  A big rock rolled down and he only just escaped being hit.

  一块大石头滚了下来，差点儿砸着他。

  I saw tears rolling down her face.

  我看见眼泪从她脸上流了下来。

  The raft is rolling down the river.

  木筏沿河顺流而下。