1.the disadvantages of education overshadows the beneficts. 这句话对吗？关键是用overshadows还是overshadow呢 2.Indeed，the idea that a person can attain personal success only......这里我想表达一个人用（不分男女的那种）用a persong 可以吗？关键会和后面的personal的看上去太相似而缺少词语变化使句子变LOW吗？