Sure, you can take bus number 21. or subway line one.

你可以坐21路公交车或者地铁一号线。

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Boy: Sure, you can take bus number 21, or subway line one.

男孩：你可以坐21路公车或者地铁一号线。

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For Milan's number 21 these last 10 months have been unforgettable.

对于米兰的21号来说，这10个月是难以忘记的。

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Ryder Cup player Robert Karlsson, the world number 21, who is the highest-ranked player in the field, finished in a share of 69th after a 72.

BBC: Dougherty shares lead in Sweden

Horse number 21: Bay gelding collapsed against a water trough.

BBC: 'Worst ever' animal neglect case

The Russian raced out to a 4-1 lead in the breaker, but the world number 21 was not to be denied as she saved a set-point before closing out the match in just under an hour and a half.

CNN: Henin and Clijsters reach Brisbane semis