Breathing - Exhalation Technique（呼吸-呼气的技巧） Very few novice swimmers exhale properly into the water.
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完成4-7-8呼吸技巧的第一步是张大嘴巴呼气同时发出“呼”的声音。
To do the 4-7-8 breathing technique, you first need to exhale completely through your mouth while making a 'whoosh' sound.
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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