A new system allows a combine harvester, say, to send a call over to a tractor-trailer so the driver can unload the grain as and when necessary.

例如，一种新的系统允许联合收割机向牵引拖车发送呼叫，以便司机可以在必要的时候卸载谷物。

youdao

He describes it as a system of "5,000 Opteron processors and 3.5 petabytes of disk storage that can be dropped off overnight by a tractor-trailer rig.

他把它描述为这么一个系统，“它拥有5000个处理器，总容量3.5PB的硬盘存储器(1PB=1024TB,1TB=1024GB,3.5PB大概是367万GB)，但却可以在一个晚上被一台拖车卸载装配完成。

youdao

Tractor trailer wheeled mobile robot system is composed of a tractor and multiple trailers, its motion trajectories are much more complex than that for single body robot.

带拖车的轮式移动机器人系统由一节牵引车拖挂若干节拖车构成，其运动轨迹具有单车体机器人无法比拟的复杂性。

youdao