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一棵樹的真正價值是用幾十年衡量的，而不是美元。

譯文：做事情一定要切實認真，不要有浮躁之氣，做人一定不能貪圖沒有實際用處的名聲。賞析：做事要靜心耐得住寂寞，方能成功，做人不要在乎虛名，虛名只會讓我們迷失方向。

我們都是自然的實驗品。

Come,my friends,Tis not too late to seek a newer world,For my purpose holds to sail beyond the sunset，And though we are not now that strength which in old days moved earth and heaven,That which we are, we are;-- One equal temper of heroic hearts, Made weak by time and fate, but strong in will. To strive, to seek, to find, and not to yield。