One of the big disincentives to placing weapons in space has been the technical difficulty and cost of such an enterprise.
一直以来,

部署武器的主要障碍
一就是技术难度以及

业的高昂成本。
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Yeah, one of the Japanese demographers I was looking at on this a few years ago, His thesis was, no, once it flips, it doesn't flip back, because you've changed all the politics to where people get disincentive.
是
,几年前我研究过
一位日本人口学家提出,一旦生育率逆转, 它就不会再反弹,因为你已经改变了所有政策, 使得人们失去了生育
动力。 因此,应当将这种低生育率视为永久性
生育水平。