基本解释n.乙醛；醋醛同根派生 英汉例句用作名词 (n.)Acetaldehyde almost exists ubiquitously and is harmful to people.乙醛广泛存在于环境中,危害人体健康。The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化。