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- A family of stags once existed with an antler only on one side. 曾有一群雄鹿，仅一边有角。
- I exult over its death, because from this I know that it once existed. 我对于这死亡有大欢喜，因为我借此知道它曾经存活。
- There once existed a city hall, a church and 1000 residential houses. 曾有市政厅、教堂、医院及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. 科学家们还不能确定,究竟有多少个细胞存在于人体内,估计大约有10至100万兆不定。但,你曾以一个单细胞的形式存在,而仅是半小时而已。
- 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. 科学家现在并不确定人体内到底有多少个细胞；估计从10万亿-100万亿不等。但你曾经以一个微细胞的形式存在，时间大约为半小时。
- A visible trace,evidence,or sign of something that once existed but exists or appears no more. 遗迹过去曾经存在但现在不再有的一种可见的痕迹、证据或某物的标志
- The Ancient One showed her the ancient city of Thule as it once existed in another time and place. 旧一向她展示极北之地的远古城市，因为它曾经在另外的时间和地方存在过。
- It is necessary that he be sent there at once. 有必要马上派他到那里去。
- She writes to her parents once a week. 她每周给父母写一封信。
- NASA's Mars detector, Opportunity, succeeded in finding signs that water once existed on the planet. 美国国家航空航天局的“机遇号”火星探测器于一月份在火星上着陆。
- A visible trace, evidence, or sign of something that once existed but exists or appears no more. 遗迹过去曾经存在但现在不再有的一种可见的痕迹、证据或某物的标志
- Moreover, scientists cannot quantify the likelihood that life exists or once existed on planets other than Earth. 另外，现在或过去是否有生命存在于地球以外的行星?
- Nasa has found what it calls “strong evidence” that life once existed on Mars after re-examining a meteorite. 近日，美国宇航局发现火星曾存在生物体的“有力证据”，这一结论是在该机构对一枚陨星进行重新检测后得出的。
- A relationship of controller and controlled once existed between the two countries. 这两个国家曾经是领属关系。
- It frustrates one to see the insects preying on the beautiful garden that once existed. 不过没关系，努力工作，再加上专注，花圃又会重获原貌，生气勃勃。
- 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. 是我们对自己过去生活的一种肯定，是表明自己曾经存在和现在还渴望再拥有的那份情趣和满足。
- At the same time, the handful of architecturally ambitious public works commissions that once existed in the United States has largely dried up. 同时，美国曾有少数在建筑方面具有旺盛企图心的公共工程委员会，大多已经消失。
- The Sky burial once existed in the Southeast Asia region and exists in the Tibet today both reflect the Indian Indic Mahayana Buddhism. 曾存在于东南亚地区和现存于我国西藏地区的鸟葬就是对印度佛教大乘密宗思想的反映。
- More than once I've felt my heart slip a cog. 我不止一次感到心脏突然停跳一下。
- The discovery of the oceanic-island basalts has disclosed that there once existed the well-developed palaeo-oceanic crust in the Meso-Tethys. 它的发现丰富了班-怒带的研究内容，证明当时中特提斯洋曾经有发育完好的古洋壳存在。
