Solid rocket propellant burns very rough.

固体火箭推进剂剧烈燃烧。

They're only 1% of the mass of the total rocket, propellant and all.

它们只占整个火箭、推进剂和所有东西质量的 1%。

Imagine if you could make your rocket propellant from resources you find on the moon.

想象一下，如果你能用在月球上找到的资源制造火箭推进剂。

By extracting and utilizing the water, astronauts can generate oxygen for breathing, produce rocket propellant, and even sustain agriculture without soil through a technique called hydroponics.

通过提取和利用水，宇航员可以产生供呼吸的氧气，生产火箭推进剂，甚至通过一种叫做水培法的技术来维持农业。

It could shed light on how Earth acquired its liquid water; it is also ripe for conversion into rocket propellant.

它可以揭示地球如何获得液态水；液态水也可以转化为火箭推进剂。

And then you have the energy in your rocket propellant, and once you max out what is possible with chemistry, then there isn't anymore.

然后你的火箭推进剂就有了能量，一旦你把化学的可能性发挥到最大，就再也没有了。

We have 4, maybe 5 classes of rocket propellants to choose from these days, just a handful of chemical options to try and nudge the rocket equation in our favor.

这些天我们有 4 种， 也许 5 种火箭推进剂可供选择，只有少数化学选择可以尝试推动火箭方程式向我们有利的方向发展。

So if you make rocket propellant systems based on hydrogen and oxygen, you will at least in concept be able to refuel your rockets almost anywhere you want to go in our solar system.

因此，如果你制造基于氢和氧的火箭推进剂系统，你至少在概念上能够为你的火箭补充燃料， 几乎任何你想去我们太阳系的地方。