Someday we may be able to take any cell and keep it alive functioning and reproducing itself essentially forever through the use of telomerase.(总有一天，我们也许能够利用端粒酶使任何细胞保持活力，使其正常工作并永久地自我复制。)
I'm now applying to graduate school, which means someday I'll return to a profession where people need to be nice to me in order to get what they want.(我现在正在向研究生院提交申请，这意味着有朝一日，我会重新找到一份工作，一份人们为了得到他们想要的东西而对我非常友好的工作。)
"When I was a little girl, I saw an ice-cream truck and knew I wanted to have one someday," McCartney said.(“当我还是个小女孩的时候，我看到了一辆冰淇淋车，我知道有一天我也想要一辆。”麦卡特尼说。)
They hope paper bags will be banned someday.(他们希望有一天纸袋会被禁用。)
Someday a stranger will read your e-mail without your permission or scan the Website you've visited.(总有一天，一个陌生人会在没有得到你允许的情况下阅读你的电子邮件，或者浏览你访问过的网站。)
When you only focus on a big goal someday, it's easy to get burned out by the daily grind.(当你只将注意力放在一个大目标的时候，你很容易就被日常单调的事情磨得筋疲力竭。)
It looked exactly like mine, which is inspiring in a way knowing my violin could also produce beautiful tones, that maybe I would sound that good someday.(它看起来和我的琴一模一样，挺鼓舞人心的，因为这让我知道我的琴也能发出这样优美的音色，也许有一天，我也能演奏出那么好听的乐曲。)
Someday, you can retell your family's stories.(有一天，你可以复述你家庭的故事。)
There is a tree in front of my house. Someday, I found a bird's nest in it.(在我的房子前面有一棵树。有一天，我发现树上有一个鸟巢。)
I solemnly vowed that someday I would return to live in Europe.(我郑重起誓总有一天我要重回欧洲生活。)
