• The aim of this experiment was to see if his mother was right and that cracking the knuckles causes arthritis4.

    这个实验目的就是看看母亲是否正确,因为他母亲认为扳指关节会导致关节炎。

    youdao

  • The aim of this experiment was to see if his mother was right and that cracking the knuckles causes arthritis4.

    这个实验目的就是看看母亲是否正确,因为他母亲认为扳指关节会导致关节炎。

    youdao

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