想想类似手机这种看似无害的东西吧——一方面，手机可以用来进行小额信贷和基于文本的社交，但另一方面，它也可以成为临时制作的爆炸装置。

Think of something as seemingly benign as the cellphone—we have microfinance and text-based social networking at one end of the spectrum, and improvised explosive devices at the other.

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他用干净的床单临时制作绷带。

He improvised a bandage out of a clean sheet.

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他用叶子临时制作一张床。

He improvised a bed out of leaves.

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