vapour trail的意思|示意

The vapour trail, which some said appeared to be coming from a missile moving vertically into the sky, was filmed by the news helicopter near Los Angeles, in southern California.

那道蒸汽轨迹是广播公司的直升飞机在离洛杉矶不远，加利福尼亚南部拍摄到的，有人说，那道轨迹似乎像来自于一个垂直飞向天空的导弹。

When a charged particle zips through the chamber, the vapour condenses into a trail of droplets showing the particle's path and, if the box is placed in a magnetic field, its electrical charge.

当一个带电粒子快速穿越云室时，水汽会凝结形成一串小液滴，这样便标识出了该粒子的路径；若将容器置于一个磁场中，还能知道粒子所带电荷的性质。

The jet fighter let go a silver vapour trail and disappeared at once in the blue.

那架喷气战斗机放出了一条银白色的雾化尾行，随即消失在天空中了。