The drain is clogged.下水道堵了the sewer is chocked up下水道堵了。the sewer is blocked下水道堵了clog: become or cause to become obstructed堵(被粘的,潮湿的)block:hinder or prevent the progress or accomplishment of堵(被挡住,堵住)chock:secure with chocks被什么东西堵住了。sewer:下水道,阴沟,污水管drain:下水道,排水沟