He swims the best in Class Two.

他在二班游泳最好。

He swims the best in Class One.

一班他游泳最好。

We achieve best in class performance!

我们表示优胜，成绩卓著。

However, she is our best in class performance.

但她是我们班上学习成绩最好的。

Best in class.

在等级中最好的。