n.水垢
Pour Coca Cola into your kettle and leave all day. This will remove limescale and leaves it clean inside. 在茶壶中灌满可乐，静置一天，这样可以去除茶壶内部的茶渍。
Pour Coca Cola into your kettle and leave all day.This will remove limescale and leaves it clean inside. 在茶壶中灌满可乐，静置一天，这样可以 去除茶壶内部的茶渍 。
