他在这盘发球出现了一些双误。
如果是双误，对手即使没有还球，发球方也会失分。
If you fail again, you lose the point even though your opponent has not even had to return the ball.
费雷尔在第三盘中拿下了十一分，并且有十三次非受迫失误和三次双误。
Ferrer won 11 points in the third set, when he committed 13 unforced errors and hit three double faults.
她在第一盘以40比15领先于辛吉斯，接着以发球双误输掉了下一盘。
She overcame Hingis’ 40-15 lead in the first set. Then she double-faulted twice to lose the next one.
她在第一盘以40比15领先于辛吉斯，接着以发球双误输掉了下一盘。
She overcame Hingis' 40-15 lead in the first set. Then she double-faulted twice to lose the next one.
“我在两个重要的破发点上出现了双误，这可能是导致我在比赛中失败的原因，”伊斯内尔说。
"I double-faulted on two important break points and that's what probably cost me the match," Isner said.
虽然佩内塔追回一局，但她在接下来的发球局关键时刻出现双误，使韩馨蕴以6比4扳回一盘。
Although Flavia Pennetta recover a board, but she in the next serve critical moment appear double faults, make han Xinyun in 6 than 4 pulled a plate.
库尔尼科娃的比赛发挥不稳定。她在第一盘以40比15领先于辛吉斯，接着以发球双误输掉了下一盘。
Kournikova's game was erratic. She overcame Hingis' 40-15 lead in the first set. Then she double-faulted twice to lose the next one.
但是在比分来到5 - 5的时候，费雷尔两次击球下网，并送出一个双误—第二发球出了发球线超过一英尺—让穆雷取得了破发。
But serving at 5-5 Ferrer hit two shots into the net and then double-faulted — missing the second serve by more than a foot — to give Murray the break.
但是在比分来到5 - 5的时候，费雷尔两次击球下网，并送出一个双误—第二发球出了发球线超过一英尺—让穆雷取得了破发。
But serving at 5-5, Ferrer hit two shots into the net and then double-faulted — missing the second serve by more than a foot — to give Murray the break.
相电流差突变量选相元件在单回线故障中具有良好的选相性能，但在同杆双回线跨线故障中可能误选相。
Although fault component current phase selector has excellent performance for single transmission lines, it may select unwanted phase for cross-country faults in double-circuit lines on a same tower.
而在格林版中，继母出席了白雪公主的婚礼，她误穿上一双烧红的铁舞鞋发狂地舞蹈至死。
In the Grimm tale, the stepmother attends the wedding of Snow White, were she is made to put on a pair of red-hot iron shoes and dance to her death.
由于采用双波长法得到的脉搏波信噪比较低，且脉搏波又不具有明显的特征(例如心电信号中有QRS波群)，因此常用的脉搏波波形识别方法正确检出率不高，经常出现漏检或误检。
But the pulse waveform obtained from this method merely has distinctive features such as the QRS complexes in ECG, so the ratio of correct detection of pulse waveform is always low.
灰度直方图算法有效避免了直方图法的漏检问题和灰度图法的误检问题，同时采用双阈值法提高了检测效率。
The method can effectively avoid the problems of undeteeting and false drop, and it uses the dual-threshold method to improve the detection efficiency.
灰度直方图算法有效避免了直方图法的漏检问题和灰度图法的误检问题，同时采用双阈值法提高了检测效率。
The method can effectively avoid the problems of undeteeting and false drop, and it uses the dual-threshold method to improve the detection efficiency.
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