经过一天的休息，他发觉他憋气的时间比过去增加了十个数。

A day's rest, he discovered, had improved his count by ten.

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其次是运用呼吸技巧，例如，分别各用四秒的时间吸气和呼气，中间憋气两秒。

Second, use a breathing technique. For example, breathing in for four seconds, then breathing out for four seconds, with a two-second pause between breaths.

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