building usable floor area的用法和樣例：
例句
- The gro area is around four hundred and fifty square feet and the net area is three hundred square feet.
建筑面積約四百五十平方英尺，使用面積約三百平方英尺。 - The application program area is employed by the system programmer for implementing the control program.
這個(gè)應用程序使用面積是由系統程序員實(shí)現控制程序。
