1817年，在第一次移民大潮中，一位英国游客观察到：“古老的美洲似乎正在分裂并向西移动。”
"Old America seemed to be breaking up and moving westward," observed an English visitor in 1817, during the first great wave of migration.
那是我第一次到唐人街参观。
这已经不是你第一次意识到自己处于这种情形了。
It's not the first time that you've found yourself in this situation.
这次航行使他第一次体验到自由的滋味。
今年8月，当她第一次意识到自己有问题了的时候，她在雅虎的一个网瘾小组上贴出了一条信息，标题是：我有网瘾。
In August, when she first realized she had a problem, she posted a message on a Yahoo Internet addiction group with the subject line: I have an Internet Addiction.
当一个来自像越南这样温暖的国家的学生在秋天第一次到加拿大时，他首先感觉到寒冷。
When a student from a warm country like Vietnam comes to Canada in the autumn for the first time, he feels cold at first.
从他们第一次交换信件到马丁到达美国，这段时间持续了六年。
It lasted six years from their first exchange of letters to Martin's arrival in the United States.
从希腊时代到第一次世界大战，它的工作很简单：与致命疾病和严重残疾作斗争，确保生育以及减少病痛。
From the Greeks to the Great War, its job was simple: to struggle with lethal diseases and gross disabilities, to ensure live births, and to manage pain.
汹涌的海水冲进硬化的盐滩，把它们冲开，并将它们磨碎成卵石，这些卵石就是在“挑战者”号第一次取到的样本中观察到的卵石。
Turbulent waters tore into the hardened salt flats, broke them up, and ground them into the pebbles observed in the first sample taken by the Challenger.
农业让人们第一次体验到技术改变生活的力量。
Agriculture gave people their first experience of the power of technology to change lives.
孩子们在3岁的时候第一次被组织到实验室，讨论他们过去印象深刻的事情，比如第一次和家人的放松旅行，第一次遇到的跳舞失误，以及第一天上学等等。
The children were organized to the laboratory for the first time at the age of 3 and discussed impressed things from their past, such as the first relaxing trip with your family, the first dancing accident you met, and the first day of school.
就在这时，我第一次注意到这个男孩看不见，因为他是盲人。
Just then, for the first time, I noticed that the boy could not see because he was blind.
2008年我父亲得了脑癌，那是我第一次认识到“科技安息日”的重要性。
I first understood the importance of "Technology Shabbat" in 2008, when my father had got brain cancer.
去年6月，她第一次在互联网上了解到跑步捡垃圾运动，并决定付诸行动。
Last June, she first learned the idea of plogging on the Internet and decided to plog.
穿一套漂亮的西装，打一条领带，第一次见客户时，你一定要准时到，好吗？
Wear a nice suit and a tie, and you first meet the customer, you should be sure to arrive on time for a meeting, OK?
我们都很乐意想到现在读这个故事的孩子们，当他们第一次读到时，意识到曾经在很短的时间里，在一个很小的地方，有一群没有偏见的人创造了一个关于对别人的爱和善意的动人的故事。
We both love thinking of the children reading the story today, coming to it for the first time and realizing that once, for a short time and in a small place, a group of prejudice-free people created a touching story of love and kindness towards others.
当我第一次到芝加哥，他们做得还不够好。
这也是我的第一次到那儿。
大约在公元3世纪，波利·尼亚人第一次航海到这个小岛。
Some time around the 3rd century A.D, Polynesians first sailed to the island.
人们这还是有生以来第一次见识到河床也被晒干了。
People are seeing riverbeds dry for the first time in their lives.
1973年的石油危机让欧洲第一次意识到问题的存在。
当你第一次意识到这个事实的时候你定会感到很惊异。
The first time you become conscious of this truth, it's bound to come as a shock.
第二天是我第一次到法校的日子。
这是我们第一次看到能量是如何涉及到守恒过程中。
This is the first time we see how energy is involved in the conservation process.
第一次到那里时我几乎没注意到那个庭院。
“对我来说，感觉到自己有吸引力这是第一次”她说。
"For the first time, I felt that I was attractive," she says.
这是我们第一次感觉到这是一个公正的选举，所以我们想要参加投票。
This is the first time that we feel like we are looking at a fair election, so we want to vote.
阿美：这是你第一次到这里吧？
阿美：这是你第一次到这里吧？
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