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1. The direct-drive cyclometer is a crucial component in the car's engine performance.
直接驱动测速器是汽车发动机性能中至关重要的组成部分。
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2. The engineer used the direct-drive cyclometer to monitor the vehicle's speed and adjust the throttle accordingly.
工程师使用直接驱动测速器来监测车辆的速度，并相应地调整油门。
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3. During the race, the driver used the direct-drive cyclometer to keep track of their competitors' positions.
在比赛中，驾驶员使用直接驱动测速器来跟踪竞争对手的位置。