美国将在今后几天测试其终端高空区域防御系统或称萨德。

The U.S. is expected to test its Terminal High Altitude Area Defense system, or THAAD, sometime in the next few days.

终端高空区域防御系统或“萨德”，通过检测来袭导弹并在空中将其击毁。

The Terminal High-Altitude Area Defense system, or THAAD, works by sensing incoming missiles and shooting them out of the sky.

完成中段拦截最有难度的，中国把战区高空区域防御弄得像小孩游戏那么轻松。

This is the most difficult one to accomplish and make Thaad look like child's play.