Most of the students dress down for class, usually wearing jeans and T-shirts.大部分学生都穿便装去上课，通常是牛仔裤和T恤衫。

On Fridays everyone in the office dresses down.每逢周五办公室员工都穿便装上班。

He was/got dressed down for failing to follow orders.他因为没有听从命令被狠狠地训斥了一顿。