发警报,吹警报号;敲警钟;
Sound the alarm bell in case a fire breaks out.
万一发生火灾你就按响警铃.
No, they could not sound the alarm.
不, 他们不会发警报.
Press the button to sound the alarm in case of fire.
万一发生火灾,按这个按钮报警.
Together we had done our best to sound the alarm.
我们曾一同竭尽全力发出过警报.
The was unsafe; it was our duty to sound the alarm.
大桥不安全, 我们有责任发出警告.
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