题目内容：

学校图书馆需要购置一批新书，现向学生征求意见。假如你是李华，请你用英语给图书馆王老师写一封信，推荐科普类图书（popular science books）和文学类图书（literary books），并分别说明推荐理由。

参考词汇：自然原理：principles of nature, 科学发现：scientific discoveries，伟大思想：great thoughts.

注意：100词左右，开头已给，不计入总词数。

Dear Mr. Wang,

Knowing that our library is going to buy books, …

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Yours,

Li Hua