acetic [sulphuric] acid 醋[硫]酸
tart fruit; 酸果
sour pear; 酸梨
be grieved; feel sad; 心酸
Her nose twitched and she began to weep. 她鼻子一酸,流下泪来。
(of a poor scholar) miserable and shabby; 寒酸
(of a scholar) poor and pedantic; 穷酸
have a pain in the back; have a backache; 腰酸背痛
I walked off my legs. 我的腿都走酸了。
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)