bladder expansion

例句：

1. 1. The patient's bladder was severely expanded due to the infection.
   由于感染，患者的膀胱严重扩张。
2. 2.The doctor advised him to undergo a cystectomy for his bladder expansion.
   医生建议他接受膀胱切除术来治疗他的膀胱扩张。
3. 3.Hydronephrosis is a condition where the kidneys become enlarged and the bladder becomes weak.
   肾积水是一种情况，肾脏变大，膀胱变弱。