1. 現(xiàn)有大量關于第一次世界大戰(zhàn)的文獻。
   There is now extensive literature dealing with the First World War.
2. 第一次測量聲速是在什么時候？
   When did the first measurement of the speed of sound take?
3. 不久以后，他第一次就這一事件發(fā)表了公開聲明。
   Soon afterwards he made his first public statement about the affair.
4. 如果我沒記錯的話，我們第一次相遇是在紐約。
   We first met in New York, if my memory serves me.
5. 他是第一個到達那里的。
   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. 他不是第一流的音樂家。
   He's not in the first grade as a musician.

一的英語翻譯：