21.Wisdom is better than gold or silver.
知识胜过金银，
22.Wisdom in the mind is better than money in the hand.
胸中有知识，胜于手中有钱。
23.A little knowledge is a dangerous thing.
浅学误人。
24.Wisdom is to the mind what health is to the body.
知识之于精神，一如健康之于肉体。
25.Experience is the best teacher.
经验是最好的教师。
26.Experience is the father of wisdom and memory the mother.
经验是知识之父，记忆是知识之母。
27.Practice makes perfect.
熟能生巧。
28.Rain cats and dogs.
倾盆大雨
29.Where there is smoke, there is fire .
无风不起浪
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