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As it happens, a razor that is safe in Europe is unlikely to electrocute Americans.

碰巧在歐洲使用安全的剃須刀不大可能使美國人觸電身亡，

There has long been a superstition among mariners that porpoises will save drowning men by pushing them to the surface, or protect them from sharks by surrounding them in defensive formation.

長期以來，海員中流傳著一種迷信的說法，認(rèn)為海豚會把快要淹死的人托到水面，救人性命；或在人們周圍列隊保護(hù)，使他們免遭鯊魚傷害。

It is now being used indifferently for both.

人們現(xiàn)在正漫不經(jīng)心地把知識用于這兩個方面，

Appreciation of sculpture depends upon the ability to respond to form in three dimensions.

對雕塑的鑒賞力取決于對立體的反應(yīng)能力。

To escape from the Earth in a rocket, one must travel at seven miles per second.

要乘坐一枚火箭飛離地球，火箭的速度要達(dá)到每秒7英里，

and should never be added to drinking water.

永遠(yuǎn)不能摻入飲用水。