Another problem is the strain that a person is subjected to when a rocket leaves the ground.

另一个问题是当火箭飞离地面时人所承受的应力。

youdao

The way it works is that the entire rocket unit leaves Earth's atmosphere, and then the 15-story-tall rocket booster separates, flips and comes back to a landing zone six miles away.

它的工作方式是，整个火箭单元在离开地球大气层之前，15层楼高的火箭助推器完全分离并翻转，然后在六公里之外的着陆区重新着陆。

youdao

This, he says, is where Skylon leaves NASA crafts or the European Space Agency's (ESA) Ariane five rocket, in its wake as they need expensive, disposable rockets to propel them into orbit.

他说，这是天龙和NASA航天飞机以及欧洲航天局(ESA) Ariana5号火箭的不同之处。因为他们认识到，NASA和ESA的做法需要昂贵的一次性火箭才能将航天器送入轨道。

youdao

One rocket leaves the launch pad, executes a 90-degree turn about 50 feet off the ground, streaks at several hundred miles an hour straight toward a group of landsailers, crashing just short of them in a cloud of white dust.

FORBES: "Let's Punch A Hole In the Sky"