(1)Uneffective较少用;含义与ineffective相同: 　　(a)Heisanineffectiveteacher/leader(无效/无用的老师,领袖);anineefectivelaw 　　(无效的法规);sheisineffective 　　无用 　　(useless)inanemergency";anineffectivemethod 　　(无效的方法);Reformwillcontinuetobepainfulandineffective... 　　(2)Ineffectual:也是少用;含义与ineffective大致相同 　　(a)ineffectualruler=anineffectualruler无效的统治者;(b)anineffectualtreatmentforcancer无效的治疗(c)thewell-meaningbutineffectualjobsprogramsofthe 　　past无效的方案(d)Themayorhadbecomeineffectual无效inthewaragainst 　　drugs