在英汉翻译中，"bitter"和"acrid"都可表示"苦味"，但存在以下关键区别：
1. 词义侧重
-- bitter：强调纯粹味觉上的苦（如苦瓜、黑咖啡），可指生理感受或情感痛苦
（例：bitter medicine 苦药；bitter memories 痛苦回忆）
-- acrid：特指刺激性的苦（如烧焦味、化学物质），常伴随刺鼻气味
（例：acrid smoke 呛人的烟雾；acrid taste of burnt rubber 橡胶烧焦的辛 ...(以上内容有节略,please sign in for more)
word-vs-word-cn
【Bitter】 , 【acrid】 are applied to things with an unpleasant taste (also smell, in the case of 【acrid】 ) that is neither sweet nor bland yet seldom distinctly sour or really sickening.
【Bitter】 is traditionally associated with the repellent taste of wormwood, quinine, and aloes, but it is also used to describe the taste of beer, unsweetened chocolate, and the rind of citrus fruits. Something 【bitter】 usually lacks the pleasant tang and freshness of an acid flavor (as of lemon juice) and has a penetrating and persistent quality difficult to mask.
【Acrid】 implies a bitterness in taste that has an astringent or irritating effect (as the taste of chokecherries, various unripe fruits, or alum). It is also applied to something both 【bitter】 and salty (as sweat).
An 【acrid】 smell is a penetrating, suffocating, repugnant odor. It is especially associated with certain fumes (as from burning sulphur) or with certain noxious vapors (as of a heavy city fog).
