Hydrostatic transmission and its application in underground trackless vehicles .

静压传动及其在地下矿山无轨车辆上的应用。

Tempest roams in the pathless sky , ships are wrecked in the trackless water , death is abroad and children play .

暴雨在无径的天上漫游,船只在无轨的水中被撞碎。

Ships are wrecked in the trackless water .

船只在无踪的水里崩解。

The trackless forest where the little girl had got lost was scoured .

那个小女孩儿走丢的人迹罕至的森林被彻底的搜查了一遍。

When entering the vast trackless seas , a keen sense of direction is key to seeing land again soon .

在广阔无垠的海洋上航行，敏锐的方向辨别能力是能否重新回到陆地的关键。