The 4G mission is set to launch from Cape Canaveral in the United States on a space X Falcon 9 rocket in 2019.

4G 任务将于2019年从美国卡纳维拉尔角发射，搭载的是 space X 猎鹰9号火箭。

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Elon Musk's Space X aims to send an unmanned aircraft to Mars by 2018.

埃隆·马斯克的太空探索技术公司计划在2018年之前将一架无人驾驶飞机送上火星。

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We'll have X-ray vision and space elevators and live at least twice as long and be able to move things, perhaps even martinis, with our minds.

我们将拥有X光视界、空间电梯和两倍的寿命，能够用念力移物（比如说马汀尼酒）。

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The X-15 was the first major investment by the United States in manned space flight technology.

VOA: special.2010.07.07

XYZ I might as well do it as x, y, z because we are talking about something that is going in three space.

我最好设成,因为我们在讨论,三维的事物。

麻省理工公开课 - 固态化学导论课程节选

So this line here declares a variable, just storage space called "x" and it's of type "int," which means an integer has to go in it.

这里的这条线声明了一个变量，一个叫做“x“的存储空间，它的类型是“int“,意思是里面存储的是整数型的数据。

哈佛公开课 - 计算机科学课程节选

In fact, Tesla and Musk, a self-made billionaire whose Space X startup is privatizing space travel, would seem to be poster children for the type of entrepreneurialism Romney says he seeks to unleash.

FORBES: Memo To Mitt: Tesla Is Not Solyndra

The news comes after NASA announced that Space X was fully certified to shuttle (as it were) cargo up to the permanent space station.

ENGADGET: Alt-week 8.25.12: robotic noses, Nodosaurs and Space X launches again

In 1999, it deployed the powerful Chandra X-ray space telescope, with the first female commander at the helm, Eileen Collins.

CNN: NASA weighed retiring Columbia in 2001