acid

a.酸的，酸性的 n.酸

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