二等的英文：
second-class

参考例句：

2class ;two 2nd cl tickets
两张二等票.

"Give me a second - class weekend return, please. "
请给我一张周末的回程的二等来回票。

I got a second-class ticket on the train to New York.
我弄到一张去纽约的二等火车票。

"One single, second class, to Winchester, please. "
买一张去温彻斯特单程二等票

Category of mail that is given less priority than first-class mail
二等邮件(次于获优先处理的一等邮件)

Five plus two equals seven.
五加二等于七。

Second classstandard of accommodation
(住宿等的级别的)二等

They sat in a second-class compartment.
他们乘坐的是二等车厢。

Second class
第二流的，二等的

Second class is cheaper.
二等邮件较便宜.

second是什么意思：
adj. 第二的；第二次的；次要的
adv. 以第二位
n. 秒；第二名
v. 支持，赞同

the second in command
副司令员

grounded to the second baseman.
打到二垒手位置的滚地球

Down Second Avenue
沿着第二条林荫大道走去

'You' is a second person pronoun.
你是第二人称代词。

Habit is second nature
习惯成自然

class是什么意思：
n. 班级；阶级；种类
v. 分类；把…分等级
adj. 很好的

It is a step class.
这是踏板操训练班。

The class dismissed.
下课了。

The class teacher sectioned the class for dialogues.
老师把班级分组进行对话练习。

The class teacher dismissed the class on time.
教师按时下课。

A second - class letter is slower than a first - class.
二类信比一类信件慢。