"of the highest class" with reference to some standard of excellence, 1837, from first (adj.) + class (n.). Specifically in reference to conveyances for travel, 1846. In reference to U.S. Mail, 1875.
权威例句
1. English has hurt me a thousand times, but I still regard it as my first love.
英语伤我千百遍,我待英语如初恋。
2. I picked first all the people who usually were left till last.
我先挑出了所有通常留到最后的人。
3. Their first car rolls off the production line on December 16.
他们的第一辆车于12月16日下线。
4. They were still arguing the toss about the first goal.
他们仍在为第一个进球争论不休。
5. It is better to stretch the tight muscles first.