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1.The car's tip speed ratio is set to 50:50, which means it can accelerate from 0 to 60 miles per hour in half the time it takes to do so on a standard highway.
这辆车的提示速度比设置为50:50，这意味着它以标准高速公路上一半的时间从0加速到60英里每小时。
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2. The engineer used a special tool to adjust the tip speed ratio of the engine, which improvedits efficiency significantly.
工程师使用一种特殊的工具来调整发动机的提示速度比，这显著提高了其效率。
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3. In the new model, the tip speed ratio has been optimized for better fuel economy and reduced emissions.
在新款模型中，提示速度比已被优化，以获得更好的燃油经济性和减少排放。