erosion of vulva

例句：

1. 1.The river eroded the banks of the town.
   河流侵蚀了城镇的河岸。
2. 2.The soil was severely eroded by the wind.
   土壤被风严重侵蚀。
3. 3.The old building was slowly eroding away due to neglect.
   由于忽视，这座老建筑正在慢慢消失。