gain a ride的意思|示意

Glider flight is a controlled descent; pilots gain altitude only if they catch rising air and ride it aloft.

用滑翔机飞行只是对下降的控制，真正的飞行员只有不断利用上升气流才能在空中越飞越高。

For example, you may not have experienced a ride in a rocket, but you could gain some understanding of this by listening to someone who explained his or her experience.

例如，你可能没坐过火箭，但当别人向你讲述了他的经历后，你就能对此有所了解。

But organising 5m drivers to fight back was a hard task, because each driver could hope for a free ride on the efforts of the others, and none had much to gain personally by joining the group.

但要组织五百万的司机对此进行抗议却并非易事，因为每个人都希望他人出力而自己则“搭便车”，坐享其成，而且任何人加入集体后能给他自身带来的利益是微乎其微的。