1.
a star of the first, second, etc magnitude
一等星、 二等星.
2.
a first-,,second-,,third-rate job
一等、 二等、 三等的工作
3.
You have a coach ticket.
“您的票是二等票。”
4.
What class (of degree) did you get: first, second or third?
你获得哪一等（学位）：一等，二等，还是三等？
5.
What class did you get, first, second or third?
你得的是几等学位？一等，二等还是三等？
6.
They sat in a second-class compartment.
他们乘坐的是二等车厢。
7.
of lesser quality than second-rate.
质量上比二等还要差的。
8.
We sat in a secondclass compartment.
我们乘坐二等车厢。
9.
I 'd prefer a night coach .
我倒想买夜间二等机票。
10.
Where 's the second - class sleeper ?
二等卧车车厢在哪儿。
11.
Can I get a seat in the executive section?
我能坐在二等舱吗?
12.
We always travel cabin class.
我们经常坐二等舱旅游。
13.
(of a triangle) having two sides of equal length.
（三角形）有二等边的。
14.
equivalent binary digit
等价的二进制数字;等效二进位数;等值二进数
15.
One, two, three, etc. are the cardinal numbers.
一、二、三等是基数。
16.
Multiply three By four gives twelve.
三乘以四等于十二。
17.
number of equivalent binary digits
等价二进制数位位数
18.
binary equivament machine instruction
等价二进制机器指令