试航的英文：
trail run
trial trip

参考例句：

A shakedown voyage,flight,trial,etc
最后试航、试飞、试用等.

The aircraft behaved well on its first test flight.
这飞机在首次试航时运作正常。

trail是什么意思：
v. 追踪；拖在后面；拖曳；落后于
n. 小径；足迹；踪迹；一缕，一股

There is a warm trail.
这是刚留下的新鲜痕迹。

The police trailed the thief.
警察跟踪小偷。

The children trailed behind their teacher.
孩子们跟在老师后面走。

run是什么意思：
n. 奔跑，跑步；旅行；趋势
v. 跑步，奔跑；逃跑；参赛；行驶；运转；（使）流动；管理

run the rapids.
冲过急流

Run (or Hold) with the hare and hunt (or run) with the hounds
两面讨好

Hold (or Run) with the hare and run (or hunt) with the hounds
两面讨好

trial是什么意思：
n. 审讯；试验，试用；磨难；努力；选拔赛
adj. 试验的，试用的；审讯的

Trial by ordeal.
神裁法。

The trial attracted wide attention.
此案审理引起了广泛关注。

The boy is a trial to his parents.
这男孩是他父母的包袱。