These were launched into orbit on May 24th by SpaceX, an American rocketry firm.

5月24日，这些卫星由美国火箭公司SpaceX发射进入轨道。

That's because rocketry is the only form of transportation where you throw away your vehicle once you've reached your destination.

这是因为火箭是唯一的交通工具，而且一旦抵达目的地就会废弃。

So the holy grail of rocketry or space transport is full and rapid reusability.

因此，火箭或太空运输的圣杯是完全快速的可重用性。

So I just have to emphasize that the changes we're talking about today, these are not incremental, small advances in rocketry and spacecraft.

所以我必须强调，我们今天谈论的变化，这些不是火箭和宇宙飞船的增量小进步。

My friend Jaan Tallinn likes to point out that just as with rocketry, it's not enough to make our technology powerful.

我的朋友 Jaan Tallinn 喜欢指出， 就像火箭技术一样，仅仅使我们的技术强大是不够的。

In one Ukrainian city a rocketry hobbyist nicknamed " Rocketrin" builds, on a workbench at home, his second version of such a system.

在乌克兰的一个城市， 一位绰号为“Rocketrin”的火箭爱好者在家里的工作台上建造了他的第二个系统版本。

As a boy in the '60s, he was the archetypal kid who built model planes and joined the rocketry club and never stopped daydreaming about human flight.

他是个典型的60年代的男孩，制作模型飞机，加入火箭俱乐部，从未停止过对人类飞行的幻想。