The prototype ship has been tested inside the hangar, rising and descending under its own power.

原型船已经在机库中进行测试, 凭借自身的力量上升和下降。

Oumuamua to look like it was moving under its own power.

Oumuamua 看起来像是在靠自己的力量移动。

But recent research suggests that Quetzalcoatlus could fly -- and do so under its own power.

但最近的研究表明，羽蛇神可以飞翔——而且是靠自己的力量飞翔。

It was a very awkward situation. Neither Dr. Carey nor Stuart could see the little automobile, yet it was rushing all over the room under its own power, bumping into things.

现在的情况太糟了。凯里医生和斯图亚特都看不到那辆小车了，可它还在房间里到处冲撞着。

Nor yet when, tiring of song-and-dance pictures, her ambition had reached out to drama; her rocket had shot to the stars under its own power, it would seem.

也没有什么时候，厌倦了歌舞片，她的野心已经伸向了戏剧；看来，她的火箭是靠自己的力量飞向了群星。

Then a workman seats himself on the gasoline tank, which contains a small quantity of its indispensable fuel, starts the engine, and the thing moves out the door under its own power.

然后一个工人坐在装有少量不可或缺的燃料的油箱上，启动发动机，那东西就靠自己的力量移出了门。