lightfastness

例句：

1. 1. The dog is very lightfast in the snow.
   这只狗在雪地里非常敏捷。
2. 2. The athlete demonstrated remarkable lightfastness during the race.
   这位运动员在比赛中展示了惊人的敏捷。
3. 3.The new car has a lightfastness that makes it easy to maneuver.
   这款新车的敏捷性使得驾驶起来非常方便。