ultrasonic distance measurement的用法和樣例：
例句
- Moe has a grass shearer in his mouth and ultrasonic range finders to keep him from crashing into things.
莫伊的嘴巴里安裝有割草機，身上還裝有防止碰撞物體的超聲波測距儀。 - The experimental results showed that the ultrasonic rangefinder doesn't fit to explore the circular surface of small radius of curvature.
實驗結果表明，超聲波測距儀不適合曲率半徑小的圓弧曲面探測。
