If someone treats you as a second-class citizen, they treat you as if you are less valuable and less important than other people.
Too many airlines treat our children as second-class citizens.
太多航空公司把我们的孩子当作二等公民来对待。
If you describe something as second-class, you mean that it is of poor quality.
second-rate
I am not prepared to see children in some parts of this country having to settle for a second-class education.
我不愿看到在这个国家部分地区的儿童们只能勉强接受次等的教育。
The second-class accommodation on a train or ship is the ordinary accommodation, which is cheaper and less comfortable than the first-class accommodation.
He sat in the corner of a second-class compartment.
他坐在一个二等车厢的角落里。
Seven second-class passengers prepared to disembark.
七名二等舱的旅客准备下船了。
Second-class postage is a slower and cheaper type of postage.
If you travel second class on a train or ship, you travel in the ordinary accommodation, which is cheaper and less comfortable than the first-class accommodation.
I recently travelled second class from Pisa to Ventimiglia.
我最近乘二等舱从比萨旅行到了文蒂米利亚。
Second class is second-class accommodation on a train or ship.
'Is there any chance of a compartment to myself?'—'Not in second class.'
“有没有可能买个我个人的包厢?” “二等车厢里不行。”