When they are being manufactured in a weightless environment, those atoms line up absolutely perfectly. The vacuum of space also means that contaminants can't sneak in.
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Москвичей предупредили о резком похолодании09:45
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原子能领域专业人才应当坚持立德为先、诚信为本，弘扬科学家精神，遵守学术和伦理规范，恪守职业道德。