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1. 如果你曾经得过肾结石，那么你就会知道它们会有多疼痛。

   rú​guǒ nǐ céng​jīng dé guò shèn​jié​shí, nà​me nǐ jiù huì zhī​dao tā​men huì yǒu​duō téng​tòng.

   If you’ve ever had kidney stones then you know how painful they can be.

   Source: CCMatrix