可以选择几个期间，但一次只能选择一个现状。
You can select several periods but only one actuality at the time.
我之前也尝试过几次，但一次都没成功，但这一次我做到了！
I've tried to teleport many times before, and it never worked, but this time it finally did.
我认为我们应该每两个星期开一次会，但一次开九十分钟或是加长。
I think we should meet once every two weeks, but meet for ninety minutes or more.
尽管迭戈·弗兰从小练的是网球，但一次家庭悲剧后他下决心追随父亲的脚步。
Despite this Diego grew up playing tennis and it was only after a family tragedy that he decided to follow in his father's footsteps.
类似的实验也有用光镊的，玲说，但一次只能对一个DNA链作用。
A similar experiment has been done using optical tweezers, Ling said, but it involves only one DNA strand at a time.
我默默地从他的右手里接过伞。他告诉我说他曾想做一名警察，但一次意外事故毁灭了他的梦想。
I took the umbrella from his right hand and he told me that he once had dreamed of being a policeman, but an accident ruined his dream.
“你想要几个胚胎就几个胚胎，但一次只能移植一个，”专家组成员KarlNygren说道，他是瑞典斯德哥尔摩一个诊所治疗不育的医生。
"You can have as many embryos back as you like, only one at a time, " says group member, Karl Nygren, a fertility doctor from a clinic in Stockholm, Sweden.
我想我们已经讨论过了这个问题，但为保险起见，我再问你一次。
I guess we've already talked about this but I'll ask you again just in case.
重度抑郁发作可能在一个人的一生中仅出现一次，但更经常的是，它在一个人的一生中反复出现。
An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life.
这份重写本后来经历了一些艰难的时期，但最终，它在一次艺术拍卖会上被买走，然后捐给了巴尔的摩的一家艺术博物馆，用于保护和研究。
The palimpsest then went through some more tough times, but eventually it ended up in an art auction where was bought and then donated to an art museum in Baltimore, for conservation and study.
但布洛姆菲尔德争辩说，目前这一持续性事件正是对洛杉矶警察在损失控制方面的一次演习。
But Broomfield argues that the long-running case is now an exercise in damage limitation for the Los Angeles police.
一次检查显示，他的肺部左下叶有一小块肿瘤，但尚未扩散。
A checkup revealed a small tumour on the left lower lobe of his lung, but it had not yet metastasized.
地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。
Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.
我自己的大部分大学书籍还在我身边，很少查阅，但总是在那里，提醒着我在一次朝圣中的时刻，阶段。
The bulk of my own college books are still with me, rarely consulted but always there, reminders of moments, of stages, in a pilgrimage.
我为主角的结局感到遗憾。但每当我想起他的光辉岁月，我的悲伤又一次被惊奇和钦佩所取代。
I feel sorry for the ending of the main character. But whenever I think about his glory days, my sorrow is once again replaced with wonder and admiration.
但每一次你尝试做一件事，你都会学到东西，随着学习的积累，世界会向你敞开大门。
But each time you try something, you learn, and as the learning piles up, the world opens to you.
你必须在镜头前表现得自然点儿，但这是你第一次在镜头前跟父母打招呼。
You have to be comfy on camera, but this is your first chance to say hello to mom and dad on camera.
我讨厌晚宴。但鉴于我在伦敦，我决定再尝试一次。
I hate dinner parties. But I decided to give them another shot since I'm in London.
但重要的是要记住，演讲就像生活中的其他事情一样，总有第一次。
But it's important to remember that speeches are like anything else in life—there's always a first time.
尽管苏比约翰花了更长时间完成项目，而且两人完成的任务都很成功，但当有职位空缺时，苏得到了第一次升职。
Although Sue took longer to complete her projects than John and both were equally successful on the assignments they completed, Sue was given the first promotion when there came a vacancy.
虽然我们从未经历过那样的灾难性损失，但吉布斯和我确实在我们决定简化程序之前进行了一次简短的密切通话。
Though we've never had a catastrophic loss such as that, Gibbs and I did have a close call shortly before we decided to simplify.
勒让蒂乘坐一艘法国军舰横穿印度洋逃亡时看到了一次壮观的凌日现象，但船剧烈摇晃，使任何准确观测的尝试都以失败告终。
Fleeing on a French warship crossing the Indian Ocean, Le Gentil saw a wonderful transit, but the ship's pitching and rolling ruled out any attempt at making accurate observations.
温迪和迈克尔第一次就把他们的圣诞树安装好了，但约翰不得不稍作改动。
Wendy and Michael fitted their trees at the first try, but John had to be altered a little.
我看了看他们第一次冲下马路的地方。有刹车的痕迹，但很模糊；像是几年前留下的。
I looked to the road where they first went off. There were skid marks, but they were faint; as if they were years old.
但是一次偶然的机会，他发现已故祖父家有一个破旧但功能齐全的实验室，正是这个发现使得这位年轻人确定了他对化学的热情。
But it was a chance stumbling upon a run-down, yet functional, laboratory in his late grandfather's home that solidified the young man's enthusiasm for chemistry.
我们一直在宣传 Endure的生产过程，但最新研究表明，尽管我们的袜子具有耐久性，但我们的普通客户实际上还是要每三个月购买一次新的Dura-Socks。
We have always advertised our use of the Endure process, but the new study shows that despite our socks' durability, our average customer actually purchases new Dura-Socks every three months.
也许这与常数变化相一致，但这是第一次，它将会改变我们对自然规律的看法。
Maybe this is consistent with a change in the constants, but this would be the very first, and it would just change our view of the laws of nature.
皮埃尔·塞林格被任命为加州参议员，但随后在第一次选举中失败。
Pierre Salinger was appointed senator from California but subsequently lost his first election.
皮埃尔·塞林格被任命为加州参议员，但随后在第一次选举中失败。
Pierre Salinger was appointed senator from California but subsequently lost his first election.
应用推荐