例句與造句

1. This race features the use of Fixed Brush hurdles.
2. By 1886, Sprague's company had introduced two important inventions : a constant-speed, non-sparking motor with fixed brushes, and regenerative braking, a method of braking that uses the drive motor to return power to the main supply system.
3. It's difficult to find fixed brush in a sentence. 用fixed brush造句挺難的