像BMP4一样，卡莫·杜林基因表达得越强，雀喙就会变得越长。

As with BMP4, the more that calmodulin was expressed, the longer the beak became.

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当科学家们在小鸡胚胎中人为提高卡莫·杜林的量时，小鸡开始长出长长的、很像探食仙人掌的雀喙。

When scientists artificially increased calmodulin in chicken embryos, the chicks began growing extended beaks, just like a cactus driller.

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