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