Advantage: benefit, positive aspect, strength, 好处

　　Disadvantage: weakness, drawback, negative aspect, fault不利

　　Casual: arbitrary, unplanned, unexpected, 随意的

　　Effective: efficient, effectual, fruitful, productive, valid多效的

　　Criticize: reproach, blame, 批评

　　Flaw: weakness, defect 缺点

　　Ability; capability, power, caliber能力