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

有器比空气重, 有轻。

Making sure the MAV is still upright?

确保器还立着吗？

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

器能够抵达火星低轨。

Flyer's battery only lasts about 20 minutes.

器的电池只够支撑20分钟的。

This is the moment when it touched down.

这就是器降落的刻。

But the tiny flyer was tough to control.

但这种小小器很难控制。

China launched a new spacecraft to the moon.

中国再次向月球发射器。

The orbiter is still doing its job circling the moon.

轨道器仍在绕月。

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

机和其他器是宫崎骏作品的色。

Majestic flying machines fill the sky.

壮观的器布满天空。

But they were not preparing to fly an aircraft.

但他们并没有准备好驾驶器。

The acceleration of this craft is negative.

该器的加速度为负。

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

但是ISIS甚至都没有空军或器。

Which means we need to make the mav lighter.

也就是说得把器变轻些。

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

上面有小块莱器的碎片。

So this is really a gargantuan vehicle.

所以这个器真的非常庞。

And the vehicle performed very well.

这个器表现得非常好。

There's no burner like a hot air balloon.

没有什么器能比得上热气球。

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

登上器后，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器。