名词
中文翻译：速率
同义词：
['speed', 'rate of speed', 'setting rate', "setting speed例句：1. The car'sacceleration is the rate of its change inspeed.（汽车的加速度是其速度变化率。）"]
例句：
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1. The car'sacceleration is the rate of its change inspeed.
汽车的加速度是其速度变化率。
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2.The project's budget is the rateof its expenditure.
该项目的预算是其支出率。
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3. The machine's efficiency is therate of its output to input ratio.
这台机器的效率是其输出与输入比率的速率。