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There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.

城市是一個活的有機(jī)體，不斷演變。

今天種下的每一棵樹都是留給后代的遺產(chǎn)。

We live in an age that reads too much to be wise, and thinks too much to be beautiful.

人類活動正在成為一種強(qiáng)大的地質(zhì)力量。