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

有飞行器比空气重, 有轻。

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

飞行器够抵达火星低轨。

This is the moment when it touched down.

这就是飞行器降落的刻。

But the tiny flyer was tough to control.

但这种小小飞行器制。

China launched a new spacecraft to the moon.

中国再次向月球射飞行器。

Is the probe going to be ready on time?

飞行器准备好吗？

The orbiter is still doing its job circling the moon.

轨道飞行器仍在绕月飞行。

To fly an aircraft that's completely silent, makes no sound.

我们的飞行器一点声音也没有。

Now there's one problem with robots like this.

这些飞行器有一些主要的缺点。

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。

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。

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。

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。

A race of red men who travel our world in flying machines.

一个乘坐飞行器路过我们这里的红色种族。

And here there's a single person able to lead this network of followers.

所以这个实验员够主导这一群飞行器。

The spacecraft is going to make a loop around the moon before returning to Earth.

该飞行器将在绕月后返回地球。