- 释义：
- vi. 发信号；预示；表明
- 构词：
- sign记号,信号,标志+al→n.信号,暗号 v.发信号,用信号通知
- 例句：
-
Experts regarded it as a warning signal of an economic smashup.
专家们把它看作是一场经济灾难的警告信号.
换一句
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The carrier wave has got out of phase with the signal wave.
载波同信号波是异相的.
换一句
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This train stops to let off passengers on signal.
这列火车按信号停车让旅客下车.
换一句