Or it could also involve believing they lack moral fibre – the ability to behave correctly or with self-control.

或者还会认为他们缺乏moral fibre，坚定的品行——使行为正确或自控的能力。

Plato worried that they would rot the moral fibre of his Republic.

柏拉图担心他们会腐烂他的共和国的道德纤维。

People tend to think of fatness as an indicator of laziness, of over-indulgence, of a lack of moral fibre, an unwillingness to take hold of your own life.

人们往往会把肥胖看作懒惰，过度放纵或缺乏道德精神，不愿意掌控自己人生的象征。