nacre

常见例句

As a resul t, nacre thickness is sometimes just a cosmetic layer t hat can wear thin over time.
所以真珠质的厚度就像脸上化妆品，不久就会磨薄了。
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Not only then are they smaller, less robust creatur es, but the pollution in the water changes the color of the nacre and change the color of the pearl.
珍蚌不但更小，生命力更弱，受到污染的水会改变真珠质和珍珠的颜色。
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Only relatively pristine material has the goods Landman is after, so his team uses a scanning electron microscope (below), which utilizes a beam of electrons to image surfaces, to find the best nacre.
只有相对原始状态的材料才拥有兰德曼所需要的研究对象，因此他的研究小组必须使用利用电子束表面成像的扫描电子显微镜（下图）去寻找最好的珍珠层。