danger signal

 
  • n. 危险信号

danger signal的用法和样例:

例句

用作名词 (n.)
  1. A red lamp is used as a danger signal.
    红灯用作危险信号。
  2. The engine also began its whistle-calls of four parts, with which it signalled danger to important crossings.
    机车也开始在过重要的道口时,发出断续四响的汽笛声,作为危险信号。

danger signal的相关资料:

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