In 1998 astronomers discovered that the universe's expansion is accelerating at a rate consistent with a cosmological constant 10-120 times the value predicted by quantum theory.
天文学家于1998年发现到宇宙正在加速膨胀，但其加速度所对应到的宇宙常数，却是量子理论预测值的10 - 120倍。
The technology can not only meet strength demand of concrete structure but also solve the problems of accelerating construction speed and guaranteeing constant work.
解决了冬施中既要满足混凝土结构的强度要求，又要加快施工进度，保证连续作业的问题。
If you used a gear like this in your car, it would be impossible to maintain a constant speed-you would be accelerating and decelerating constantly.
假如你的车内使用这种齿轮，那么你就不可能保持稳定的速度-你就一直在加速或减速。
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