acid

n. /ˈæsɪd/ B2

酸；酸性物质

A chemical substance that has a pH less than seven.

仙境例句

“Lemon juice is an acid,” said the old crab, “and that is why it tastes so sour.”

“柠檬汁是一种酸，”老螃蟹说，“所以它才这么酸。”