a person or thing that repeats something, in particular 重复者,尤指 ■a firearm which fires several shots without reloading 连发火器,连发枪 ■a watch or clock which repeats its last strike when required 打簧表,打簧钟,连打钟 ■a device for the automatic retransmission or amplification of an electrically transmitted message 重发器,转发器;增音器 ■a railway signal indicating the state of another that is out of sight 复式信号灯