signal n. v. adj.

n.
1.信号、暗号=sign
a danger signal 危险信号
a warning signal 警告信号
2.标志、预示=indication
The rise in inflation is a clear signal that the government's policies are not working.
通货膨胀率的上升清楚地表明，政府的政策不起作用。
3.指示灯、信号灯、红绿灯
traffic signals 交通信号灯
4.电视信号
TV signals

v.
1.发信号、发暗号、示意
Don't fire until I signal.
等我发出信号后再开枪。
2.标志、表明、预示=indicate
This announcement signalled a clear change of policy.
这个声明显示政策有明显的改变。
3.表达、表示、显示
He signalled his discontent by refusing to vote.
他拒绝投票以示不满。

adj.
重大的、显要的=important
a signal honour 极大的荣誉

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