志愿者: volunteer...
日复一日: day after day...
咬: bite; snap at; gnaw...
暖烘烘: nice and warm, cozy, heartwarming...
水平: level (of achievement etc), standard, horizontal...
碰到: to come across, to run into, to meet, to hit...
涨: (of water, prices, etc) rise; go up...
