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open ball

  • 开球:数学中的一个概念,表示在度量空间中,以某个点为中心,距离小于某个正数的所有点的集合。

权威例句

  • Trott, moved up the order to open to allow England to play five bowlers, took 33 balls to get off the mark and his reluctance to play any form of sweep to a spin-oriented attack saw the innings grind virtually to a halt.

    BBC: England on back foot against Bangladesh in Mirpur

  • Even Pietersen, having scampered through for a risky single as is his wont to open his account, scored only one more run in his next 32 balls, before finally stepping down the wicket to loft his first boundary.

    BBC: England on back foot against Bangladesh in Mirpur

  • The gutta percha balls once belonged to golfing legend Old Tom Morris, who won the Open four times in the 1860s.

    BBC: Quiz of the week's news

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