noun 下载 🔗分享 烷烃,饱和烃 Any acyclic saturated hydrocarbon (e.g., methane, ethane, etc.). Examples : "The carbon chain of an alkane may be linear or branched, but must not contain loops (cycles); its chemical formula is of the form CnH2n+2." 烷烃的碳链可以是直链或支链,但不能包含环状结构;它的化学式为CnH2n+2。 chemistry compound substance fuel 与AI对话词汇游戏阅读练习