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If there is one -- which I take leave to doubt -- then it is older people who create it, not the young themselves.

如果這個問題存在的話 -- 請允許我對此持懷疑態度 -- 那么，這個問題是由老年人而不是青年人造成的。

and of dark narrow streets full of petrol fumes and toxic gases,

和陰暗狹窄的街道組成

Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.

藏書使教育成為可能，而教育反過來又豐富了藏書，因為知識的增長遵循著一種“滾雪球”的規律。印刷術的發明又大大提高了知識增長的速度。

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。

it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth.

在月球上加速到每秒1。5英里比在地球上所用能源要少得多。

a ticklish business which is achieved with the aid of two tame elephants roped to the captive on either side.

這是一件棘手的事，需要在它兩側拴上兩頭馴服的大象才能完成。