device是可数名词吗

　　A powerful device exploded outside the station.

　　一枚威力巨大的炸弹在车站外爆炸了。

　　Bomb Squad officers carried out a controlled explosion of the device.

　　炸弹处理小组官员在严密控制下引爆了这一装置。

　　Players use a haptic device such as a joystick to control the game.

　　游戏者用游戏杆之类的触觉设备玩游戏。

　　The device was protected by patent.

　　这一装置受专利保护。

　　There is a new device for cars that warns drivers of traffic jams ahead.

　　有一种新的汽车装置可提醒司机前面有交通堵塞。

　　The new device emits a powerful circular column of light.

　　新设备发出明亮的圆形光柱。