• 三种基本发球方法:发球发球发球大力钩手发球

    There are three basic kinds of the underhand serve the overhand serve and the hook serve or roundhouse serve.

    youdao

  • 三种基本发球方法:发球发球发球大力钩手发球

    There are three basic kinds of the underhand serve the overhand serve and the hook serve or roundhouse serve.

    youdao

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