closure system

• 闭包系统

closure system的用法和样例：

例句

1. In effect you have a backpack camera system with a waist belt for added stability during longer hikes on difficult trails.
   事实上你有一个双肩摄影包系统外加一条腰带用于在长途崎岖的路上徒步时起稳定作用。