acid

/ˈæsəd/

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

中文释义：酸；酸性物质

Lemon juice contains citric acid, which gives it a sour taste.

柠檬汁含有柠檬酸，这使其带有酸味。

Acid rain can damage buildings and harm plant life in forests.

酸雨会损坏建筑物并危害森林中的植物。