perpetual loan

例句：

1. 1. The perpetual sun never sets.
   太阳永远不落。
2. 2.The perpetual spring is a mythical place.
   永恒的春天是一个神话般的地方。
3. 3.The perpetual snowfall has made the mountain look like a giant's beard.
   无尽的雪让这座山看起来像巨人的胡须。