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- A family of stags once existed with an antler only on one side. 曾有一群雄鹿，僅一邊有角。
- I exult over its death, because from this I know that it once existed. 我對於這死亡有大歡喜，因為我藉此知道它曾經存活。
- There once existed a city hall, a church and 1000 residential houses. 曾有市政廳、教堂、醫院及1000幢民居,人口3000以上。
- Scientists are unsure how many cells exist in the human body; estimates range from 10 to 100 trillion. But you once existed as a single cell-for about half an hour. 科學家們還不能確定,究竟有多少個細胞存在於人體內,估計大約有10至100萬兆不定。但,你曾以一個單細胞的形式存在,而僅是半小時而已。
- Scientists are unsure how many cells exist in the human body; estimates range from 10 to 100 trillion. But you once existed as a single cell - for about half an hour. 科學家現在並不確定人體內到底有多少個細胞；估計從10萬億-100萬億不等。但你曾經以一個微細胞的形式存在，時間大約為半小時。
- A visible trace,evidence,or sign of something that once existed but exists or appears no more. 遺迹過去曾經存在但現在不再有的一種可見的痕迹、證據或某物的標誌
- The Ancient One showed her the ancient city of Thule as it once existed in another time and place. 舊一向她展示極北之地的遠古城市，因為它曾經在另外的時間和地方存在過。
- It is necessary that he be sent there at once. 有必要馬上派他到那裡去。
- She writes to her parents once a week. 她每周給父母寫一封信。
- NASA's Mars detector, Opportunity, succeeded in finding signs that water once existed on the planet. 美國國家航空航天局的「機遇號」火星探測器於一月份在火星上著陸。
- A visible trace, evidence, or sign of something that once existed but exists or appears no more. 遺迹過去曾經存在但現在不再有的一種可見的痕迹、證據或某物的標誌
- Moreover, scientists cannot quantify the likelihood that life exists or once existed on planets other than Earth. 另外，現在或過去是否有生命存在於地球以外的行星?
- Nasa has found what it calls 「strong evidence」 that life once existed on Mars after re-examining a meteorite. 近日，美國宇航局發現火星曾存在生物體的「有力證據」，這一結論是在該機構對一枚隕星進行重新檢測后得出的。
- A relationship of controller and controlled once existed between the two countries. 這兩個國家曾經是領屬關係。
- It frustrates one to see the insects preying on the beautiful garden that once existed. 不過沒關係，努力工作，再加上專註，花圃又會重獲原貌，生氣勃勃。
- Is we one kind of affirmation which pass to oneself live, is indicate done self once exists and the present also longed for again had that galliardise and satisfied. 是我們對自己過去生活的一種肯定，是表明自己曾經存在和現在還渴望再擁有的那份情趣和滿足。
- At the same time, the handful of architecturally ambitious public works commissions that once existed in the United States has largely dried up. 同時，美國曾有少數在建築方面具有旺盛企圖心的公共工程委員會，大多已經消失。
- The Sky burial once existed in the Southeast Asia region and exists in the Tibet today both reflect the Indian Indic Mahayana Buddhism. 曾存在於東南亞地區和現存於我國西藏地區的鳥葬就是對印度佛教大乘密宗思想的反映。
- More than once I've felt my heart slip a cog. 我不止一次感到心臟突然停跳一下。
- The discovery of the oceanic-island basalts has disclosed that there once existed the well-developed palaeo-oceanic crust in the Meso-Tethys. 它的發現豐富了班-怒帶的研究內容，證明當時中特提斯洋曾經有發育完好的古洋殼存在。
