XIX

There are xix students in the art class.

用法提示：xix 作形容词修饰 students，表示数量十九。

She has read xix novels this summer.

用法提示：xix 作形容词修饰 novels，强调数量为十九。

We need xix volunteers to set up the hall.

用法提示：xix 作形容词修饰 volunteers，说明所需人数。