They also watched its trial run.

他们还看了试车。

So you're thinking like a trial run?

所以你想来个试验期？

The result of the trial run is too bad.

试车的结果太糟糕了。

The machine, however, failed on its trial run.

但这部机器的试车失败了解。

Have a trial run of the route, especially if they walk or cycle.

对路线进行踩点，尤其是当他们徒步或骑自行车上学的时候。