The return trip was uneventful, the car running perfectly.

返程平安无事，汽车运行得很好。

He rode a shipment of machines in the truck on his return trip.

他开车回来时搭运了一批机器。

On the return trip, I know a lot.

在回来的路上，我知道了很多。

From those lonely heights, the speedy return trip was a relief.

从那样孤零零的高空急速降落，所能带来的是一种解脱。

On the return trip, the reverse path becomes the forward message path.

在返回的途中，反向路径变成正向消息路径。