She was very excited to fly first class for the first time.

她第一次乘坐头等舱，感到非常兴奋。

When will the first class begin?

第一节课什么时候开始？

Mr Wang teaches the first class.

王先生上第一节课.

The first class begins at 7:50 am.

第一节课于7点50分开始。

The first class begins at 7: 50 am.

第一节课于7点50分开始。

Tourist class passengers are prohibited from using the first-class lounge.

经济舱乘客禁用头等舱休息室。

Business Goal: produce the first class brand.

企业目标: 创一流的品牌.

The first-class Yu-hua-shi is a kind of agate.

上等的雨花石是一种玛瑙。

Cortisol levels dropped after the first class.

在第一节课后,他们的考的索水平出现了下降.

Id like to change this ticket to the first class.

我想把这张票换成头等车。