third class

基本解释

They traveled to Shanghai in third class.
他们乘三等舱去上海旅行。
《新英汉大辞典》
Isn’t it racist that the world has first, second, and third class citizens and first, second, and third class dead?
世界有第一等、第二等、第三等公民，死者也有一等、二等、三等之分；这难道不是种族主义吗？
Of the 705 people who survived, 140 were women in First Class, 80 were women in Second Class, and 76 were women in Third Class.
在生还的705人中，有140名女性是一等舱的乘客，80名女性乘坐二等舱，还有76名女性来自三等舱。

But it turns out actually over a third of people who took this class last year took the class because they felt depressed.
但是结果是去年有超过三分之一的人,选这门课是因为他们感觉抑郁。
哈佛公开课 - 幸福课课程节选
Okay. Now that's a lot of people in the class, maybe a third, a quarter, or half, something like that, a lot of people in the class.
好,班里很多同学,也许是三分之一,四分之一,或一半,班里很多人这样认为
耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选
And then third year when I taught it which was the last time, I had 850 students in the class, making it at that point the largest course at Harvard.
到了第三年，也就是上一次开课，有850人参加，是当时哈佛人数最多的课程。
哈佛公开课 - 幸福课课程节选

The medic who gave his life tending to his teammates -- Hospitalman Third Class James Layton.
WHITEHOUSE: The White House