nacre

常见例句

As a resul t, nacre thickness is sometimes just a cosmetic layer t hat can wear thin over time.
所以真珠質的厚度就像臉上化妝品，不久就會磨薄了。
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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，受到汙染的水會改變真珠質和珍珠的顔色。
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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.
衹有相對原始狀態的材料才擁有蘭德曼所需要的研究對象，因此他的研究小組必須使用利用電子束表麪成像的掃描電子顯微鏡（下圖）去尋找最好的珍珠層。