冲程

例句：

1. 1. Thecar's engine has a lot ofstrokes to make it go fast.
   这辆车的引擎有很多冲程，使它跑得很快。
2. 2. The dancer performed severalstrokes in the center of the stage.
   舞者在舞台上中心表演了几个动作。
3. 3.The boat made several strokes before reachingthe shore.
   船在到达岸边之前划了几次桨。