慢速英语:How Did You Get so Intelligent?

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intelligence/intelligent - adj., quick to understand or learn

study - v., to make an effort to gain knowledge by using the mind; to examine carefully 

different - adj., not the same

effect - n., the result or change caused by something -- “The storm had a serious effect on the economy.”

correct - adj., true; free from mistakes; v., to change to what is right