Sometimes the craft is heavier than air, and sometimes lighter.

有时飞行器比空气重, 有时轻。

Making sure the MAV is still upright?

确保飞行器还立着吗？

The MAV, that was only designed to get to low Mars orbit.

飞行器能够抵达火星低轨。

Flyer's battery only lasts about 20 minutes.

飞行器的电池只够支撑20分钟的飞行。

This is the moment when it touched down.

这就是飞行器降落的时刻。

But the tiny flyer was tough to control.

但这种小小飞行器很难控制。

China launched a new spacecraft to the moon.

中国再次向球发射飞行器。

The orbiter is still doing its job circling the moon.

轨道飞行器仍在绕飞行。

Planes and other flying machines are featured prominently in Miyazaki's works.

飞机和其他飞行器是宫崎骏作品的一大特色。

Majestic flying machines fill the sky.

壮观的飞行器布满天空。

But they were not preparing to fly an aircraft.

但他们并没有准备好驾驶飞行器。

The acceleration of this craft is negative.

该飞行器的加速度为负。

But ISIS doesn't even have an air force or any kind of aircraft.

但是ISIS甚至都没有空军或飞行器。

Which means we need to make the mav lighter.

也就是说得把飞行器变轻一些。

It's got a tiny piece of the Wright Flyer aboard.

上面有一小块莱特飞行器的碎片。

So this is really a gargantuan vehicle.

所以这个飞行器真的非常庞大。

And the vehicle performed very well.

这个飞行器表现得非常好。

There's no burner like a hot air balloon.

没有什么飞行器能比得上热气球。

Getting on board, you are going into a spacious cabin.

登上飞行器后，可以看到舱内十分宽敞。

NASA calls it the U.S. Deorbit Vehicle (USDV).

美国宇航局称之为美国脱轨飞行器。