vt.使变苦（bitter的过去式与过去分词形式）； 双语释义：adj.(形容词)苦的,有苦味的 having a sharp taste like aspirin or unsweetened coffee; not sweet难以接受的,引起悲伤的,不受欢迎的 difficult to accept causing sorrow; unwelcome怨恨的,失望的 caused by, feeling or showing envy, hated or disappointment[A]严寒的,刺骨的