劍橋詞典[ 不可數(shù)或單數(shù)名詞:沒有複數(shù)形式的名詞 ] abbreviation for patient controlled analgesia: a process in which patients suffering pain can control when and how they receive a drug to reduce their pain 自控式鎮(zhèn)痛(patient controlled analgesia的縮寫) [ 可數(shù)名詞:有複數(shù)形式的名詞 ] abbreviation for posterior cerebral artery : a blood vessel that supplies blood to the back of the brain 大腦後動(dòng)脈(Posterior cerebral artery的縮寫) 返回 PCA