The first flight into space was a brilliant feat.

第一次太空飞行是项光辉的伟绩。

Perhaps the riskiest part of space flight happens at the very end.

也许太空飞行中最危险的部分发生在最后。

And - - and flying in the space shuttle there's a lot of risk involved and it's a risk versus reward thing and the reward is really for our country and for our nation, so same thing with the science.

乘太空舱在太空飞行风险很多，但“不入虎穴焉得虎子”，这对我们的国家、民族和科学事业是有利的。

Still Space X and its CEO Elon Musk are pressing on saying reusable spacecraft like Starship will be key to getting people in space and doing it more affordably.

Space X及执行官埃隆·马斯克（Elon Musk）一直在强调，像“Starship”这样可重复使用的航天飞行器，将成为使人们以更经济的方式进行太空飞行的关键。

A veteran of four space flights, he's performed 10 spacewalks totaling nearly 68 hours outside a space shuttle or station more than any other NASA astronaut, and he's not done yet.

作为参加过4次太空飞行的老手，他执行过10次太空行走，身处航天飞机或空间站外部的总时长比NASA他宇航员都多，差不多有68小时。但是，他显然并不于此。

NASA spokeswoman Kristen Larson said by telephone, " We've agreed in principle to the flight of Mr. Shuttleworth. However, there are some final details that need to be taken care of."

美国国家航空航天局女发言人克尔斯滕•拉尔森在电话中说：“我们原则上同意舒特沃斯先生的太空飞行，但还有一些最后的细节需要处理。”

As a way to decrease the high cost of spaceflight, Falcon Heavy's three rocket boosters are designed to land upright back on earth to be reused.

作为降低太空飞行成本的一种方式，“猎鹰”重型火箭的三枚火箭助推器被设计成可以在地球上竖立起来，以便重新使用。

William Shatner, the original Captain Kirk from the " Star Trek" franchise, who, at 90 years old, will be the oldest person to ever fly in space.

《星际迷航》系列电影中的柯克船长扮演者William Shatner今年90岁，他将成为有史以来在太空飞行的最年长的人。

That is a crazy number that we would never have been discussing a while ago because in spaceflight, we are always trying to reduce mass, right?

这是一个我们之前不讨论的疯狂的数字，因为在太空飞行中，我们总是试图降低质量，对吗？

Yang, who was a pilot in the army, was chosen from 1,500 other army pilots and started training for his space flight in 1998.

军务飞行员杨是从1500名军队飞行员中选拔出来的，并在1998年为太空飞行开始训练。

They will take people on short flights to space.

这些飞机可以搭载着人们，进行短程的太空飞行。

It's called Starlink it's being launched by the space flight company SpaceX, and it could add between 12,000 and 30,000 satellites to low earth orbit.

它被称为Starlink，由太空飞行公司SpaceX发射，用以在近地轨道上增加1.2万到3万颗卫星。

We're not progressing in terms of human spaceflight very fast.

我们在人类太空飞行方面的进展不很快。

500 people have bought tickets of an as-of-yet unscheduled flight into space with Virgin Galactic.

500 个客户购买了维珍银河尚未计划的太空飞行的机票。

This is all part of a multi-billion dollar contract SpaceX has with NASA to regularly run such missions, ushering in a new era of space flight.

这是SpaceX与NASA签订的数十亿美元合同的一部分，该合同将定期执行此类任务，开创太空飞行的新时代。

Astronaut Frank Rubiales has returned to Earth after 371 days in space.

宇航员弗兰克·卢比奥在太空飞行 371 天后返回地球。

It has provided NASA with valuable data on building future aircraft to fly in space.

它为NASA提供了建造未来太空飞行飞机的宝贵数据。

And now scientists say they've discovered some new risks with long term space flight.

现在科学家表示，他们发现长时间太空飞行还存在他风险。

But Jing has done this before — it is his third space flight.

而景海鹏之前有过航天经历，此次是他第三次进行太空飞行。

You know, that comet...It's been traveling across space for thousands of years. All alone.

你知道吗，那颗彗星......孤单地在太空飞行了上千年。