他有17次双发失误。

He served 17 double faults.

《柯林斯英汉双解大词典》

如果他没有在抢七中双发失误而失掉第三盘？

What if he had not produced a double fault to lose the third set tiebreak?

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同时，该协议将替代去年12月到期的"1991削减战略武器条约"，当时，双发同意将各自战略性核弹头数目限制在1700至2200枚之间。

The new agreement would replace the 1991 Strategic Arms Reduction Treaty, which expired last December. It limited both sides' strategic nuclear warheads to between 1700 and 2200.

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