一锤定音 Final word ; Shot Caller

一锤子买卖 A one-time deal

奋力一锤 Mighty Blow

我们不做一锤子买卖 We're not fly-by-night operator

一袋锤子 A Bag of Hammers

我购买了一把大锤 I bought a sledgehammer ; I purchased a sledgehammer ; I purchased a big hammer

如果我有一把锤子 If I Had a Hammer

一个锤子 a hammer

一包锤子 A Bag of Hammers

假如我有一把铁锤 If I Had a Hammer