当头一击 meaning in English

one for his nob; be [give] a head-on blow 短语和例子

I gave one for his nob and he fell senseless .
我给他当头一击，他就昏倒了。
He dispatched the bear with one blow on the head
他给那只熊当头一击把它打死。
The nasty knock on the head bereft him of consciousness
那沉重的当头一击使他失去了知觉。
2 months into his term , however , there was a shock : black monday , on oct . 19th , 1987 , the stock market had the worst day in its history
然而，他上任后2个月就给他当头一击： 1987年10月19号，这个黑色星期一，是股票市场历史上最糟糕的一天。