sad 是形容词,sorrow是名词,你指的是sorrowful吧悲哀的:受哀伤或不快乐影响的或有其特点的(意思最为笼统)“Better by far you should forget and smile/Than that you should remember and be sad”(Christina Rossetti). “忘掉和微笑要比/记住和悲伤美好得多” (克里斯蒂娜·罗塞蒂)。Sorrowful用于指无可挽回的损失所导致的内心痛苦:“Even in laughter the heart is sorrowful” (Proverbs 14:13). “甚至在欢笑时,内心仍然痛苦” (《箴言》14:13)。