- 1.
信号;暗号 -
• a danger signal 危险信号 -
• We are waiting for him to give a signal. 我们等待他给出信号。 - 2.
标志,表示 -
• His speech was a clear signal that he would change the current policy. 他的演讲明确表明他将改变现行的政策。 - 3.
【电子】 (电子脉冲或无线电波的)信号 -
• It's an area with a poor mobile signal. 这个地区移动电话的接收信号不佳。 - 4.
【铁】 信号机 -
• a railroad crossing signal 铁路道口信号机