Doubt is the key of knowledge250字作文

　　1、Wisdom is more to be envied than riches.
　　知识可羡，胜于财富。
　　2、Wisdom is better than gold or silver.
　　知识胜过金银。
　　3、Wisdom in the mind is better than money in the hand.
　　胸中有知识，胜于手中有钱。
　　4、Wisdom is a good purchase though we pay dear for it.
　　为了求知识，代价虽高也值得。
　　5、Doubt is the key of knowledge.
　　怀疑是知识之钥。