82　at a cost of，at the cost of和at cost

① at a cost of表示“以……价格”，同钱币名词连用。

She bought the car at a cost of 10，000 dollars. 她用10000美元买了那辆车。

② at the cost of表示“以……为代价，用……换来的”，常同生命、血汗、劳力等名词连用。

He gained the wealth at the cost of his honor. 他毁了名誉获得了这笔财富。

They won the battle at the cost of many lives. 他们牺牲了许多人才赢了那一场战斗。

③ at cost表示“照成本，照原价”。

They sold the computer at cost. 他们照原价把那台计算机卖了。