第一

1. 现有大量关于第一次世界大战的文献。
   There is now extensive literature dealing with the First World War.
2. 第一次测量声速是在什么时候？
   When did the first measurement of the speed of sound take?
3. 不久以后，他第一次就这一事件发表了公开声明。
   Soon afterwards he made his first public statement about the affair.
4. 如果我没记错的话，我们第一次相遇是在纽约。
   We first met in New York, if my memory serves me.
5. 他是第一个到达那里的。
   He was the first to be there.
6. 星期日是一周的第一天。
   Sunday is the first day of the week.
7. 他不是第一流的音乐家。
   He's not in the first grade as a musician.

一的英语翻译：