speed up or speed up (something or someone) or speed (something or someone) up
: to become faster or to make (something or someone) faster（使）加速 -
I hate it when cars speed up [=accelerate] while you're trying to pass them.我讨厌那些在你要超车的时候加速的车辆。
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The work has been slow so far but it should speed up soon.工作一直进展缓慢，不过应该马上就会加快进度了。
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They add another chemical to the photo developer to speed up the process.他们在照片显影剂中添了另一种化学剂来加快显影过程。
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I'm afraid there's nothing you can do to speed things up.想要加快事情的进展，恐怕你也无能为力。
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They're working too slowly. How can we speed them up?他们工作太慢了。怎样才能让他们快点呢？
— see also speedup