If my car goes 55 miles an hour on the highway and it's going a constant speed, it's not accelerating.
如果我的车以55英里的时速匀速地行驶在高速公路上，显然它没有加速。
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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.
The technology can not only meet strength demand of concrete structure but also solve the problems of accelerating construction speed and guaranteeing constant work.