ill,sick,sickness,illness的区别

disease,illness,sickness,ill,sick的区别 ill,sick,sickness,illness的区别 illness ill sick 的 区别 sick,ill,illness,disease在用法上的区别 illness,sickness ,disease ,virus 的区别 sickness,illness,disease,trouble的区别? ill到illness的区别 ill和illness的区别 "disease"" illness"" sickness"用法上的区别是什么? ill与sick,disease,illness ill和sick的区别 sick和ill的区别?