tòng suān
意思解释：（Painful acid）悲痛辛酸。
能在水溶液中产生氢离子的化合物的统称，如硫酸、盐酸:～跟碱产生的化学反应叫中和反应|能使石蕊试纸变红的物质是～。②像醋的味道或气味:这梅子太～了|这～味儿很刺鼻|昨天剩下的粥已经变～了。③悲痛;伤心:听到她的诉说…
A general designation of the compound of pH indicator can arise in aqueous solution, like: of vitriolic, hydrochloric acid The material that Х of of act of of of Fan can make litmus paper erubescent from from head of have diarrhoea of elder brother is ～ . Does ② resemble acetic flavour or odour: Pay confused still flavour of this ～ of Shu very pungent | The congee that remained yesterday has changed ～ . Sad: of ③ distress; Is of put down Dong idle
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