動詞 exist:

1. have an existence, be extant
   同義詞：exist, be
2. support oneself
   同義詞：exist, survive, live, subsist

形容詞 existing:

1. having existence or being or actuality
   同義詞：existent
2. existing in something specified
3. presently existing

1. To join the club you have to be put up by an existing member.
   要加入俱樂部必須有一位會員做介紹人。
2. In her speech, the Minister came out against any change to the existing law.
   這位部長在她的講話中表示不同意對現(xiàn)行法律作任何更改。
3. Our future plans must mesh with existing practices.
   我們未來的計畫必須與當前的實踐相合。
4. All the cases can be considered within the framework of the existing rules.
   一切情況都可依據(jù)現(xiàn)行章程的結(jié)構(gòu)加以考慮。
5. I strongly incline to the view that we must make full use of the existing technical equipment.
   我贊成這樣一種意見，即我們必須充分利用現(xiàn)有的技術設備。
6. The electronic office will mean a revision of existing office procedures and job role.
   電子化高科技辦公室意謂著現(xiàn)有的辦公方式和角色的變更。
7. In computer security, any weakness or flaw existing in a system, the susceptibility of a system to a specific threat attack or harmful event, or the opportunity available to a threat agent to mount that attack.
   在計算機安全學中，存在于一個系統(tǒng)內(nèi)的弱點或缺陷，系統(tǒng)對一個特定的威脅攻擊或危險事件的敏感性，或進行攻擊的威脅作用的可能性。
8. We should make a better use of the existing equipment.
   我們應該更好地利用現(xiàn)有設備。