Anything you want to say about this optional class, advice or criticism.
对于这个选修课，你有什么建议或者批评吗？
The fifth part: the teaching strategies of optional class system in senior high schools.
第五部分：普通高中走班制教学策略初探。
In addition, you may also supply any of the optional attributes of the object class.
另外，还要提供对象类的可选属性。
It is always optional to re-state any base interface in a partial class.
分布类中是否重新声明它所实现的接口也是可选的。
I choose swimming class as my optional subject.
我把游泳课作为我的选修课。
I choose swimming class as my optional subject.
我把游泳课作为我的选修课。
应用推荐