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1·Is the wheeled tractor plant such an important strategic military object?

轮式牵引机真的是一个这么重要的军事战略目标吗？

2·When Zheng Huizhong was growing up in the Henan countryside, he was proud his father owned a three-wheeled farm tractor.

在河南农村长大的郑慧中，曾经因父亲拥有一辆三轮农用拖拉机感到自豪。

3·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。

4·In this paper, a wheeled mobile robot system consisting of a tractor and N-1 trailers is studied.

本文研究由一个牵引车和N - 1个拖车所组成的移动机器人系统的动力学。