noun🔗Share纳米颗粒，纳米粒子 Any microscopic particle less than about 100 nanometers (nm) in diameter. In aerosol science, the term is often reserved for particles less than 50 nm in diameter; the term "ultrafine particles" is used for particles less than 100 nm in diameter."Sunscreen contains nanoparticles that help protect your skin from the sun's harmful rays. "防晒霜含有纳米颗粒，这些颗粒有助于保护你的皮肤免受太阳有害射线的伤害。materialsciencetechnologyphysicschemistryenvironmentChat with AIVocabulary GamePractice Reading
