A single break of serve settled the first two sets.

前两盘的比赛都是靠破掉对方一个发球局而分出胜负。

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The statistical results show that the triple breaks vacuum interrupters in series have the lower breakdown probability compared with the single break one.

击穿统计特性试验研究表明，三断口真空灭弧室相比单断口真空灭弧室具有更低的击穿概率。

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The second set, which did not have a single break of serve, was overshadowed by an incident which saw Federer come face to face with a court invader at the start of the fourth game.

没有一次破发的第二场，一段小插曲让人多少感到不快。 在第四局的刚开始，费德勒就遭遇一次面对面的闯进球场球迷的侵扰。

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So for b 2, which is a single bond, that's 289 kilojoules per mole to break it, and it takes us more energy to break this double bond for carbon, which is 599 kilojoules per mole.

对于B2，它是单键，需要289千焦每摩尔来打破它，而对于碳双键,打破它要更多的能量，等于599千焦每摩尔。

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The Spaniard did not face a single break point and lost just 10 points on serve.

BBC: Brutal Nadal sweeps aside Murray

Williams hit 26 winners past the Belorussian, taking four of her five break-point chances and denying Azarenka's single break-point opportunity.

CNN: Serena Williams thrashes No. 1 Azarenka in Madrid final

Novak relied upon a single break in the deciding third set to wrap-up the match and earn his quarter-final place.

BBC: Nadal storms past Portas