火车不久就加速前进。
They've sped up production of the new car.
他们已加快了这种新汽车的生产。
They've sped up the production of the new car.
他们加快了新汽车的生产。
Since the advent of jet aircraft, travel has been sped up.
自从喷气式飞机出现后，旅行的速度加快了。
The growth rates of body weight sped up with the embryo development.
胚重的生长速度随着胚龄的增加而增加。
The growth rates of body weight sped up with the embryo development.
胚重的生长速度随着胚龄的增加而增加。
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