angle of twist per unit length of shaft

例句：

1. 1. The car's angle ofapproach is critical for the landing.
   汽车的接近角度对于着陆至关重要。
2. 2. Theangle of the roof isperfect for reading in bed.
   屋顶的角度非常适合在床上阅读。
3. 3. Theangle of the sunriseis changing with the seasons.
   日出的角度随着季节的变化而变化。