acid
/ˈæsɪd; `æsɪd/ n
1 [U, C] (chemistry 化) substance that contains hydrogen, which can be replaced by a metal to form a salt 酸（能被金属置换出氢而成为盐的物质）
Vinegar contains acetic acid. 醋中含有醋酸.
Some acids burn holes in wood. 有些酸能把木头烧成洞. Cf 参看 alkali.
2 [C] any sour substance 酸味物质.
3 [U] (sl 俚) = LSD.
4 (idm 习语) the `acid test test that gives conclusive proof of the value or worth of sth/sb 决定性考验
The acid test of a good driver is whether he remains calm in an emergency. 衡量驾驶员水平的决定性考验, 就是看他在紧急关头能否保持镇静.
acid / ˈæsɪd; `æsɪd/ adj
1 having a bitter sharp taste; sour 酸味的; 酸的
A lemon is an acid fruit. 柠檬是一种酸的水果.
Vinegar has an acid taste. 醋有酸味.
2 (fig 比喻) severe; sarcastic 尖酸刻薄的; 讥讽的: an acid wit 讥讽的才智
His remarks were rather acid. 他的话有些尖酸刻薄.
3 (chemistry 化) having the essential properties of an acid 酸性的. Cf 参看 alkaline (alkali).