noun 下载 🔗分享 取代基, 取代物 Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed Examples : "In organic chemistry, different substituents, such as hydroxyl groups or methyl groups, can change the properties of a benzene ring. " 在有机化学中，不同的取代基，比如羟基或甲基，可以改变苯环的性质。 chemistry compound substance biochemistry 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 替代成分，取代基。 (grammar) pro-form Examples : "In the sentence "Sarah likes cats, and David likes them too," the word "them" is a substituent that replaces "cats" to avoid repetition. " 在句子“莎拉喜欢猫，大卫也喜欢它们”中，“它们”是一个替代成分，取代了“猫”以避免重复。 grammar linguistics language 与AI对话词汇游戏阅读练习
