警钟的英文：
alarm bell

参考例句：

We gathered that this was taking a toll on the family and their relationship
我们推测这给他们的家庭和彼此的关系敲响了警钟。

The alarm bell's harsh tone
刺耳的警钟的声音.

This sounded the alarm for us.
这给我们敲起了警钟。

Never did funeral knell, never did alarm-bell, produce a greater effect on the hearer
这一个声音在听者耳中所产生的效力，简直比丧钟或警钟更为厉害。

But didn’t alarm bells ring when the Reynolds-directed, Costner-produced Rapa Nui bombed in 1994?
但是1994年雷诺兹导演，科斯特纳制作的《复活岛》惨遭失败时，不是已敲起了警钟吗

alarm是什么意思：
n. 警报器；闹钟；惊慌
v. 向...报警；使惊恐

In case of fire, sound alarm.
如遇火警，请拉响警报。

analogue detection and alarm system
模拟量探测器报警系统