In singles, one player serves until he makes a fault.

单打比赛中, 发球方的发球权直到他出现失误为止.

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There are two people in singles or four people in doubles or mixed doubles.

网球比赛单打为两人.双打或混合双打为四人.

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There are two people in singles and four people in doubles or mixed doubles.

乒乓球单打为两人.双打和混合双打为四人.

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They usually play in singles.

他们通常是单打的.

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Now , it is Sunday night and they have just finished a match of badminton in singles.

周日晚上,她们刚打完一场羽毛球单打赛.

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