A plume of smoke.

• 一缕烟

A plume of smoke.的用法和样例：

例句

1. As they watched, a flash of fire appeared at the root of one wisp, and then the smoke thickened.
   他们看到，在一缕烟的底部出现了一闪一亮的火光，随后烟越冒越浓。