这不仅将向伊朗统治者表明美国对协议的态度非常严肃，而且要让他们明白，美国所提出的将是他们可以期望得到的最好的交易。
That should signal to Iran’s rulers not only that the US is serious about a deal, but also that whatever the US offers is likely to be the best deal that they can get.