building usable floor area

• 使用面积

building usable floor area的用法和样例：

例句

1. The gro area is around four hundred and fifty square feet and the net area is three hundred square feet.
   建筑面积约四百五十平方英尺，使用面积约三百平方英尺。
2. The application program area is employed by the system programmer for implementing the control program.
   这个应用程序使用面积是由系统程序员实现控制程序。