单词double-fault
un.: 双层错；两次发球失误；双重故障
n.: 双发失误；双误（因两次发球失误输掉的一分）
网络: 发球两次不成功；双方失误
双发失误；双误（因两次发球失误输掉的一分）:
the loss of a point caused by a player not serving correctly twice
第三人称单数：double-faults
现在分词：double-faulting
过去分词：double-faulted
however , she failed to hold her serve with a double fault at the end , and let her opponent back in the set.
但是，在比赛接近尾声时，她因没能控制连续两次发球失误而最终使对手得以扳回比赛。
What if he had not produced a double fault to lose the third set tiebreak?
如果他没有在抢七中双发失误而失掉第三盘？
Essential snatches seven, Zheng clean presents the double fault, the bottom wire continuously, by 3: 7 discards regrettably snatches seven.
关键的抢七，郑洁连续出现双误、下网，遗憾地以3比7丢掉抢七。
Catherine! " interposed Linton, greatly shocked at the double fault of falsehood and violence which his idol had committed.
林惇插进来，看到他的偶像犯了欺骗与粗暴的双重错误大为震惊。
No elimination. Double fault. You stepped over the line on the throw.
没有被击中。双误。你扔球的时候踩线了。
After more than three hours of pulsating action, Nadal finally cracked in the third set tiebreaker at 2-2 when he served up a double fault.
鏖战了三个多小时以后，纳达尔在第三局抢七达成2-2时崩盘，当时他发出了一次双误。
Serena, 18, sagged6 in the second set tie breaker and closed with a double fault.
塞雷娜在第二盘的决胜局中士气低沉，终因发球双误败北。
Compared with normal bridge type SFCL, new bridge type SFCL"s respond for double fault is studied.
并与普通桥式高温超导限流器相比较，研究新型桥式高温超导限流器对二次故障的改善能力。
So what happens on a double fault?
那么如果双误怎么办？
Q. You committed the first double-fault.
是你出现了第一个双发失误。