老化 lǎohuà verb ① ［Chemistry］ [of macromolecular compound] age ▸ 塑料盆已经老化。 The plastic tub has already aged. ② （指机能） degenerate ▸ 动脉血管老化变硬。 Arterial blood vessels become degenerated and hardened. ③ （指年龄） grow old ▸ 教师队伍老化。 The teaching corps is ageing. ④ （指知识、技术） become outdated ▸ 设备老化 obsolete equipment ▸ 知识老化。 The knowledge becomes outdated. |