There are three basic kinds of service: the underhand serve the overhand serve and the hook serve or roundhouse serve.
有三种基本的发球方法：下手发球，上手发球和钩手发球或大力钩手发球。
There are three basic kinds of service: the underhand serve the overhand serve and the hook serve or roundhouse serve.
有三种基本的发球方法：下手发球，上手发球和钩手发球或大力钩手发球。
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