This lava stream deviated neither to the right nor to the left.

这股熔岩流既不向右偏离， 也不向左偏离。

We slid down screes of ashes, carefully avoiding the lava streams which glided sluggishly by us like fiery serpents.

我们从灰烬中滑下来， 小心翼翼地避开像火蛇一样缓慢地从我们身边滑过的熔岩流。