Teacher: Have you ever seen mixed doubles, boys?

老师：孩子们，你们见过男女混合双打吗？

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Teacher of Physical Education: Have you ever seen mixed doubles, boys？

体育老师：孩子们，你们见过男女混合双打吗？

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In this tournament are men's and women's singles, men's and women's doubles, mixed doubles , girls and boys tournament and master's competitions.

这项联赛包括男子女子单打，男子女子双打，男女混双，青年男子女子和大师赛。

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In the boys doubles second round, British pairing Lewis Burton and George Morgan came from behind to beat top seeds Duilio Beretta of Peru and Ecuador's Roberto Quiroz 4-6 7-5 11-9.

BBC: GB's Golding & Robson into Wimbledon junior semi-finals

George Morgan, who reached the boys' doubles final at Wimbledon, also lost to Slovakia's Filip Horansky.

BBC: Robson reaches last 16 at junior US Open

Golding took gold in the boys' tennis doubles after he and Czech partner Jiri Vesely triumphed in straight sets.

BBC: GB trio win medals at the Youth Olympics