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我們站在生物學(xué)新時(shí)代的門檻上。

The writer must be a perpetual questioner, a doubter of all certainties.

關(guān)于愛(ài)情最悲哀的事情不僅是它不能永遠(yuǎn)持續(xù)，而且心碎很快就會(huì)被遺忘。

The teacher is not in school to impose certain ideas or to form certain habits in the child, but is there as a member of the community to select the influences which shall affect the child and to assist him in properly responding to those influences.