Acid: A compound present in all grapes and an essential component of wine that preserves it, enlivens and shapes its flavors and helps prolong its aftertaste. There are four major kinds of acids--tartaric, malic, lactic and citric--found in wine. Acid is identifiable by the crisp, sharp character it imparts to a wine.

酸: 酸是存在于葡萄酒的重要组成部分。它有助于激活葡萄酒的风味，延长葡萄酒的余味以及提高葡萄酒的陈年能力。葡萄酒有四种主要的酸- 酒石酸，苹果酸， 乳酸，柠檬酸。酸能够给予葡萄酒甘冽, 爽口的品质。