关键词：气泡；近恒速；加速段 [gap=828]Key words：air bubble；near constant speed；accelerates
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near constant speed
近等速
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He has written a book suggesting that the speed of light is not constant, but was faster near the moment of the big bang with which most cosmologists believe the universe started.
ECONOMIST: Modern physics
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