"It has so much capability, so much more capability than any other vehicle, that I think we can start to contemplate missions like a Mars sample return, which requires a tremendous amount of lift capability because you've got to send a lander to Mars that still has enough propellant to return to Earth."
VOA: special.2011.04.11
Well, up until probably ten years ago, this was the primary propellant in just about every kind of spray thing that we had, hairspray, everything.
好吧,直到大概十年前,作为主要推进剂,存在于我们的每一个喷射器里,发胶,以及一切。
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