1、 what is a weed? —a plant whose virtues have not been discovered.

2、 動(dòng)物是如此愉快的朋友，他們不問任何問題或批評?！猤eorge eliot

3、 the man of science does not discover in order to know; he wants to know in order to discover.

4、 天知道今天好像是胡說八道，明天會(huì)被證明是真的嗎？——a. n. whitehead