noun 下载 🔗分享 氮气,氮。 The chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas. Examples : "The air we breathe is mostly nitrogen. " 我们呼吸的空气主要成分是氮气。 element substance chemistry science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 氮气,氮。 Molecular nitrogen (N2), a colorless, odorless gas at room temperature. Examples : "The air we breathe contains nitrogen. " 我们呼吸的空气中含有氮气。 element substance chemistry compound material science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 氮,氮原子,氮同位素 A specific nitrogen within a chemical formula, or a specific isotope of nitrogen Examples : "The two nitrogens are located next to one another on the ring." 这两个氮原子在环上彼此相邻。 element chemistry substance science 与AI对话词汇游戏阅读练习