The oyster dutifully coats the little marble with anouter layer of pearl and much time is saved not having to grow each pearl upfrom the size of a sand grain.

牡蛎会尽职尽忠地为自己腹中的小珠子包裹上一层又一层的珍珠质。 比起那些要从小沙粒开始慢慢成长的珍珠，人工的方法明显会节省很多时间。

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More and more tallow will rise until the water is skinned over with a rainbow mother-of-pearl layer.

越来越多的动物脂漂浮起来，直到水被一层彩虹般的小珍珠粒所覆盖。

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Pearl layer powder frow fresh water has a strong function of calming and the relatively strong function of anti-gastric ulcers.

经研究表明：淡水珍珠层粉镇静作用强，抗胃溃疡作用较好。

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