canker/kɚ/名词(树木的)溃疡病,枝枯病,根瘤病(动物或人耳部或嘴部的)溃疡,痈,疮(蔓延的)腐败;祸患;弊病Poverty is a canker eating away at the heart of society.贫穷是腐蚀社会良知的毒素。想跟读,去练习