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The real art of conversation is not only to say the right thing at the right place but to leave unsaid the wrong thing at the tempting moment.
Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
The best conservation strategies are those that align economic incentives with ecological benefits.
生活中最重要的事情是做你自己。除非你能成为蝙蝠侠,那就永远做蝙蝠侠。
可持续农业的关键在于创新和对自然的尊重。