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Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath — and what you can do when it strikes you.
Lesson by Mel Rosenberg, animation by Andrew Foerster.
اخبار الشرق الاوسط
مصر تغرق في الظلام بأمر السيسي.. غضب عارم من قرارات الإغلاق المبكر
