Using liquid hydrogen and oxygen in rockets will provide major advantages for landing astronauts on the moon.

以液氢和液氧为燃料的火箭将为宇航员登陆月球提供尤其重要的有利条件。

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They are in a condition of weightlessness. And this is why, in rockets and space capsules, weightless astronauts and objects float about in the air.

这就是为什么在火箭和宇宙飞船里，失重的宇航员和物体会在空中漂浮。

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Anyway, who would want to fire streams of rockets in a populated area?

不管怎样，谁会想在人口稠密的地区发射火箭呢？

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There were new designs for the plane's rocket engine, landing equipment and the small rockets needed to move it in space.

VOA: special.2010.07.07

The rockets, normally released before returning to Earth, could help keep a loose heat shield in place.

VOA: special.2009.06.17

It blames the Palestinian group for positioning fighters and rockets in civilian areas.

VOA: special.2009.01.10

Common uses for black powder include as gunpowder in muzzle-loading guns, as a blasting powder and as a propellant in rockets for fireworks.

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If your mother or your uncle is an engineer or a scientist, you are likely to grow up conducting experiments in the basement or launching rockets in the back yard.

FORBES: We Need All Hands on Deck for Science Education

Harden scored a career-high 46 points in the Rockets' only regular-season win against Oklahoma City, but said he didn't gain any secrets from that performance to carry over into the playoffs.

NPR: Thunder Blast Rockets 120-91 In Game 1