The spines of sea urchins can generate a voltage when water moves around them — a phenomenon that could be used to design underwater flow sensors.
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这还要回到去年月之暗面在战略上的“急刹车”，其以海外市场为主，通过API调用带动收入，都是从去年开始逐步成型的。
``@receiver isNil ifTrue: ``@nilBlock -> ``@receiver ifNil: ``@nilBlockOr maybe with single backticks?。业内人士推荐WPS官方版本下载作为进阶阅读