这是我们第一次不在一起过感恩节。
毕竟这是我们第一次见面的地方。
这是我们第一次这样写一个矢量。
Now, it's our first time writing this kind of thing with a vector.
这是我们第一次看到船长勃然大怒。
这是我们第一次见面的那一天。
这是我们第一次在白天听到炮火的声音。
It's the first time that we are hearing artillery fire in the daytime.
像这样说话，“嘿，这是我们第一次来。”
十年来，这是我们第一次正式拿到第一名。
"For the first time in a decade we are now officially ranked number one," he said.
这是我们第一次建立关系，第一次相互欣赏。
And for the first time we can relate and appreciate each other.
这是我们第一次见面。
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.
这是我们第一次去爷爷奶奶家，妈妈要我们守规矩。
It's our first time to visit our grandparents. Mother wants us to be on good behavior.
谢谢你。这是我们第一次约会。我希望不会太无礼。
Thank you. It's our first date. I hope it's not too offensive.
这是我们第一次，在这种系统里使用，角动量守恒定律。
Now we're going to apply for the first time in systems like this, the conservation of angular momentum.
这是我们第一次清清楚楚地看到非遗传因素所带来的因果关系。
This was the first time you could clearly see cause and effect from a nongenetic influence.
这是我们第一次决定重定向航天器，去关注一个有趣的发光体。
This is the first time that we have ever chosen to repoint the spacecraft to look at an interesting flaring object.
北京的环保真的有很大进步，这是我们第一次在北京看到蓝天！
The environment protection in Beijing really made a big progress, it was our first time to see so blue sky in Beijing.
在幼儿园里我们被并排放在一起，这是我们第一次在幼儿园过夜。
They placed us side by side in the nursery, our first sleepover.
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.
这是我们第一次引入自动化测试，并且我们对它工作的如此好感到惊讶。
This was our first introduction to automated testing, and we were surprised at how well it worked.
这是我们第一次做买卖，希望我们之间的交易将取得成功，彼此得益。
This is the first time we do business with each other. I hope business between us will prosper to our mutual benefit.
这是我们第一次把产品推广到北美洲，所以每一项细节当然都要考虑到。
This is our first opportunity to promote our products in North America, so we certainly want to cover every detail.
更值得注意的是，这是我们第一次能够在一个阿拉伯国家首都公开自由地讲话。
And more notably, it was the first time we were able to speak publicly and freely in an Arab capital.
当比赛开始后，我们队很慢，我们不能配合得非常好，因为这是我们第一次参加比赛。
When the match began, our team worked very slowly, we could not cooperate very well, because this was the first time for us to play.
菲奥娜：但请等等！骑士阁下，这是我们第一次见面，难道不该是一个美好而浪漫的时刻吗？
Fiona: But wait! Sir Knight, this is our first meeting, should it not be a wonderful, romantic moment?
这是我们第一次对一个乐队组合产生偏执狂热，并幻想某天我们可以跟辣妹一样一起登台表演。
This was the first time we were obsessed with a band and sometimes we wished that someday we could be performing together on stage just like Spice Girls.
这是我们第一次对一个乐队组合产生偏执狂热，并幻想某天我们可以跟辣妹一样一起登台表演。
This was the first time we were obsessed with a band and sometimes we wished that someday we could be performing together on stage just like Spice Girls.
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