劍橋詞典a three-sided area on the inner surface of the bladder (= the bag where urine collects ) （膀胱內(nèi)壁的）三角區(qū) Since most of these tumours involve the trigone, they are rarely operable . 這些腫瘤大部分發(fā)生在膀胱內(nèi)壁三角區(qū)，因此極少能做手術(shù)。 返回 trigone