| 释义 |
sig·nal¹ /`sɪgnḷ; ˈsɪɡnəl/n [c] 1. a sound, action, or event that gives information or tells someone to do something 信号，暗号:◇wait for my signal. 等我的信号。◇the result is a clear signal that voters are not happy. 选举结果是个明显的信号，说明选民不满意。 2. a series of light waves, sound waves etc that carry information to a radio, television etc ［无线电、电视等的］信号，讯号:◇broadcasting signals 广播信号 3. a piece of equipment that tells a train driver whether to go or stop 铁路信号 |