These events are the ups and downs and imperfections in life, which like grains of sand in an oyster, may be painful, but often have beautiful results.

这些事情是在我生命中的一些起伏和不完美，就像是牡蛎中的沙粒，可能会让人感到不舒服，但是通常最后结果产生的那颗珍珠是美好的。

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Rolling grains of sand hit each other "like billiard balls, " said Kirby, and briefly fly into the air.

沙砾“像桌球”一样互相撞击翻滚，然后被风吹到空气中。

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Like little grains of sand on some enormous beach, we humans dwell in our billions above the surface of this planet.

就像广袤海滩上的几颗小沙粒，我们数十亿人类居住在这个星球的表面。

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Keeping track of all of this will be like trying to count grains of sand on a windswept, stormy beach.

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The bitumen coats the grains of sand like a film and is in turn surrounded by water.

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Vaguely analogous to grains of green Hawaiian beach sand, chondrules are arguably the glue needed to make planets like ours.

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