at the first time 和 for the first time的区别
区别是：
for the first time 做时间状语，意思为首次、第一次。
at the first time 做时间状语，意思为起初、第一次。
例句辨析：
at the first time
The crabs broke this thin net at the first time.
下第一次笼子之后螃蟹就将这个细网子弄破了。
It seemed a good sign that they're cordially hobnobbing at the first time meeting.
第一次见面他们就谈得这么热乎，看来是个好兆头。
I just brought four chicken legs, but two of them were gone at the first time.
我只带了四个鸡腿，但是第一次下龙子之后就丢了两个鸡腿。
Chris has adopted an almost crazy passion for theatre and this feeling began as early as hetouched theatre at the first time.
张克士对戏剧有一份近乎痴迷的热爱，这种情感从他第一次接触戏剧就开始了。
Generally, there are too many job seekers with bachelor's degree, so they are paid little when they find jobs at the first time.
通常来说，求职者有大部分都是大学学历，所以大学生第一次找工作的时候得到的报酬很低。
for the first time
I remember seeing the ocean for the first time.
记得十八岁那年，我第一次看到海洋。
We saw rivers for the first time in days.
这么许多天来，我们第一次看见了河流。
They now work directly together for the first time.
如今，父子俩第一次直接在一起工作了。
Christmas was nice but bittersweet; for the first time since my brother was born, there were onlythree of us.
圣诞节很快乐，但也是甜中有苦，自从弟弟出生后，这是第一次只有我们三个人过圣诞节。
Mitigation really focused on the fact that for the first time in the Copenhagen Accord all the major economies agreed to implement either targets or actions.
关于减缓的讨论真正聚焦这样的事实，既首次在哥本哈根协议中，所有主要经济体同意实施或目标或行动。
参考资料
有道词典：http://dict.youdao.com/w/for%20the%20first%20time/#keyfrom=dict2.top
for the first time 做时间状语，意思为第一次。
at the first time 做时间状语，意思为起初。
例句辨析：
at the first time
1、It's the same as what he said at the first time.
和他第一次说的一样。
2、I read this essay at the first time.
我第一次读到这篇文章是在1988年。
3、We need a guide when we arrive in a new city at the first time.
当我们第一次到一个未知的城市时我们往往需要一个导游。
4、I just brought four chicken legs, but two of them were gone at the first time.
我只带了四个鸡腿，但是第一次下龙子之后就丢了两个鸡腿。
for the first time
1、Streams had run dry for the first time in memory.
记忆中，小溪第一次干涸了。
2、For the first time in my career, I was failing.
我职业生涯中第一次经历失败。
3、Now, I remember. We met for the first time in the Dabie Mountains.
哦，我想起来了。我们第一次是在大别山见面的。
4、He looked at me without speaking, and for the first time I could see the pride thatfilled him.
他看着我没有说话，我第一次看出他内心充满了自豪。
例句：
1.With audiences in the US falling for the first time in a generation, Hollywood is girding itself for recession.
随着美国的电影观众人数在二三十年里首次下跌，好莱坞正在为萧条期做好准备。
2.Jobs was famous for taking meetings on foot, especially when he was meeting people for the first time.
乔布斯以边走路边开会而闻名，尤其是对初次见面的人更是如此。
at the first time 做时间状语,意思为起初
例句：
1.And you wont necessarily succeed at everything the first time you try.
你第一次尝试做每件事的时候，不一定成功。
例句：
Jobs was famous for taking meetings on foot, especially when he was meeting people for the first time.
乔布斯以边走路边开会而闻名，尤其是对初次见面的人更是如此。
at the first time 做时间状语,意思为起初
例句：
And you wont necessarily succeed at everything the first time you try.
你第一次尝试做每件事的时候，不一定成功。
