put sth at sth
calculate or estimate (the size, cost, etc of sth) to be (the specified weight, amount, etc) 计算, 估计(某物之大小、 价值等)
I would put his age at about sixty. 我估计他大概有六十岁.
`What would you put the price of this car at?´ `I´d put it at 15000.´ `你看这辆汽车值多少钱?'`我看值15000英镑.'