الأكسجين

الضحك لدقيقتين، يعادل في فائدته الجري لعشرين دقيقة

Keep going الأكسجين 08 مايو 2017

توصل علماء إلى أن الضحك ـ حتى المصطنع منه ـ يترك أثراً إيجابياً على أجسامنا. وأثناء الضحك يدخل الهواء بقوة إلى الرئتين، وهو ما يعمل على...

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فيديو: تعرف على ذرة الأكسجين - رسوم متحركة

Keep going الأكسجين 25 أبريل 2014

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