semi-permanent snow line

例句：

1. 1. The paint on the wall issemi-permanent and will notwash off easily.
   墙上的油漆是半永久性的，不容易洗掉。
2. 2. The sunflowers are a semi-permanent solution to the problem of pollution.
   太阳花是一种半永久性的解决方案，用于解决污染问题。
3. 3. Thesemi-permanent tattoos are becoming more popular among youngpeople.
   半永久性纹身在年轻人中越来越受欢迎。