noun 下载 🔗分享 多环化合物 A polycyclic compound. Examples : "The lab analyzed the soil sample for the presence of polycyclic compounds, which can be harmful pollutants. " 实验室分析了土壤样本，检测其中是否含有多环化合物，这类物质可能是有害的污染物。 compound chemistry 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 多环的 Involving more than one cycle. Examples : "The textbook explained how polycyclic aromatic hydrocarbons, formed during the incomplete burning of fuel, can be harmful pollutants. " 这本教科书解释了在燃料不完全燃烧过程中形成的多环芳烃如何成为有害的污染物。 chemistry compound structure 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 多环的，多环结构的 Having two or more rings of atoms in the molecule. Examples : "The chemistry textbook explained that naphthalene, a common ingredient in mothballs, is a polycyclic aromatic hydrocarbon, meaning its molecules contain two fused rings of carbon atoms. " 这本化学课本解释说，萘，一种常见的樟脑丸成分，是一种多环芳香烃，意思是它的分子包含两个稠合的碳原子环。 chemistry compound 与AI对话词汇游戏阅读练习
