ac·id¹/`æsɪd; ˈæsɪd/ n 1 [C,U] a type of liquid chemical substance. A strong acid can burn holes in the things it touches. 酸〔一种液体化学物质，强酸会在接触物上烧出洞来〕: hydrochloric acid 氢氯酸，盐酸 2 the acid test a situation that proves whether something is true or as good as it is supposed to be 严峻的考验，决定性的试验〔以证明某物是否属实或如所说的那么好〕: It looks good, but will it work? That's the acid test. 这看上去不错，但是可不可行？ 那才是个决定性的考验。