The trackless wastes of the desert.

沙漠这不毛之地。

Ships are wrecked in the trackless water.

船只在无踪的水里崩解。

Twas they who rode the trackless bush in heat and storm and drought;

是他们在热风和干旱中驰骋入无路的灌木林；

The running of the small trackless equipments in 753 project are expounded.

介绍小型无轨设备在规模较小的753矿巷道掘进中的试验应用情况。

The advantages and application limitations of trackless equipment are described.

同时叙述了无轨设备的优点及其应用的局限性。