noun🔗Share氦 The second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas."The birthday balloons were filled with helium, which made them float to the ceiling. "这些生日气球里充满了氦气, 所以它们飘到了天花板上。elementchemistrysubstancematerialphysicsscienceChat with AIVocabulary GamePractice Reading
noun🔗Share氦，氦气 A form or sample of the element."The science experiment required a sample of helium. "这个科学实验需要一份氦气样品。elementsubstancechemistryChat with AIVocabulary GamePractice Reading
