No matter when, don't do anything that damages the honor of the class, make an effort for the class of "5A", fight for the glory for the class, but/and at least do not shame the class.
文明班直译的话是－civilized class,但是这里用civilized听起来很可笑（一般用在是非野人－文明人）,所以直接用class 就好了.