exist on的用法和樣例：
例句
用作及物動詞 (vt.)
- The will to live carried him on.
要活下去的意志使他堅持下去。 - Freedom is any nation's undying soul, as well as the hope for them to live on.
自由是任何一個民族不滅的靈魂，是他們活下去的希望。 - No animal or plant can exist without phosphorus.
沒有一種動物或植物離開磷能夠生存。 - The poor families survived on relief.
這些貧窮家庭靠救濟生存。
