existing evils的用法和樣例：
例句
- He always pontificates about the evils of modern society.
他經常對現代社會的弊病大發議論。 - The reform and implementation of mining right circulation have explicitly exposed the out-datedness of the existing mining right laws and administration concepts.
礦業權流轉的改革與實踐已使現行法律法規和礦業權管理理念明顯滯后的弊病暴露無遺。
