Cultured pearls don’t have at their core a grain of sand, but instead arelittle plastic or glass beads or something that pearl farmers stick into theoyster for a year or so.

对于人工养殖的珍珠而言，它们的核心并不是沙粒，而是像小塑料珠或小玻璃珠之类的物体。 珍珠养殖者把这些小东西塞到牡蛎中，然后等上一年左右的时间。

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First, ICRISAT mapped the genomic regions of pearl millet that control downy mildew resistance, grain production and straw yield under drought conditions.

首先，国际半干旱热带作物研究所绘制了珍珠谷子的基因区，这些谷子可控制干旱条件下的霜霉病抗性、谷物产量和产草量。

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Allow your disappointment to form a pearl just as an oyster does when an irritating grain of sand gets inside its shell, but grab the pearl before the sand gets in your eyes.

把你的失望孕育成一枚珍珠，就像牡蛎对待一颗落入壳中的沙砾一样，但要在沙砾进入你的眼睛前抓紧珍珠。

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