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1 张开大口打哈欠:深呼吸,吸进氧气,吐出二氧化碳,有助于脑细胞重新活跃起来。打哈欠后再施以头部按摩,效果会更佳。
1 open mouth yawn: take a deep breath, inhale oxygen, spit out carbon dioxide, help brain cells re-active. After yawning and head massage, the effect will be better.