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。
2
That is vastly superior to the $9 a day—not hour—which the tractordriver says he used to get at home in Mexico. But costs in the United States are higher too.
拖拉机司机说，这跟他过去在墨西哥家乡那会儿一天，而不是一小时才拿9美元工钱相比，兼职是天壤之别！
3
In the films of those days, all too often it was the same one: boy tractordriver meets girl tractordriver; they fall in love and drive tractors together.