first class

名词 first class:

1. the highest rank in a classification
2. mail that includes letters and postcards and packages sealed against inspection
   同义词：1st class, first-class mail, 1st-class mail
3. the most expensive accommodations on a ship or train or plane

形容词 first class:

1. of the highest quality
   同义词：excellent, first-class, fantabulous

副词 first class:

1. by first-class conveyance; with first-class accommodations
   同义词：first-class

1. This ticket doesn't entitle you to travel first class.
   你这张票不能坐头等位。
2. He always travels first class expense is no object.
   他出门总是用头等票－－费用不成问题。
3. The crew was made up of strong and able men and the mates were experienced seamen of the first class.
   船上的全体船员都是强壮能干的人，大副二副们都是第一流的有经验的海员。