acidity

n. 酸味,酸性

acerbic, acerbity, acetate, acetone, acetylene, ache, achievable, achieve, achieve one's goals, achievement, achiever, Achilles, Achilles' tendon, aching, achromatic, achy, acid, acid rain, acidic, acidify, acidly, acidosis, acidulated, acidulous, acknowledge, acknowledged, acknowledgement, acknowledgement (also acknowledgment), acknowledging, acknowledgment, acme, acne, acolyte, aconite, acorn, acoustic, acoustically, acoustics, acquaint, acquaintance,