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1. 例如，想象一下，一个测量大象脚下压力的天秤。

   lì​rú, xiǎng​xiàng yī​xià, yī​ge cè​liáng dà​xiàng jiǎo​xià yā​lì de tiān​chèng.

   Imagine, for example, a scale that measures the pressure under an elephant's foot.

   Source: CCMatrix