過去式：deterred 過去分詞：deterred 現在分詞：deterring
There are pesticides that you can spray along the baseboard of your room and also the entry area to your room. It can be effective for up to 1 year. Then you have to reapply.
答案應該是 to deter的這個字的用法應該是deter somebody from (doing) something 例如: Our security system deterred people from stealing money. 而 terrorism may be deterred 是一個被動的語氣，整個句子應該是 Terrorism may be deterred...
deter sb.from N/V-ing 阻止某人做某事 1.沒有什麼可以阻止Maria實現成為歌手的夢想。 Nothing can deter Maria from realizing her dream of becoming a singer...