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and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.

我們只要看一看蝙蝠回聲定位這一極不尋常的發現，就可以探究一下聲音在什么情況下有絕對的實用價值。

The shape and dimensions of the skyscrapers depend entirely on the necessity of obtaining the maximum income per square foot of ground,

每平方英尺地皮取得最大收入

living in a world in which undeclared aggression, war, hypocrisy, chicanery, anarchy and impending immolation are part of our daily lives, we all want a code to live by.

如今，不宣而戰的侵略、戰爭、虛偽、詐騙、無政府狀態以及即將臨頭的毀滅成了我們日常生活的一部分，我們都希望有一個賴以生存的行為準則。

And so with solids such as a shell, a nut, a plum, a pear, a tadpole, a mushroom, a mountain peak, a kidney, a carrot, a tree-trunk, a bird, a bud, a lark, a ladybird, a bulrush, a bone.

對于其他實體，如，貝殼、核桃、李子、梨子、蝌蚪、蘑菇、山峰、腎臟、胡蘿卜、樹干、鳥兒、花蕾、云雀、瓢蟲、蘆葦以及骨頭也應這樣來感覺。

but the scientific dust has long since settled,

但是，自他逝世以來，那場科學上的紛爭早已平息了下來，

and still cannot fathom the exact outline of the vision before them.

站在鏡前，不能辨認出自身的真面目。