nacre造句
- When the pearls are later harvested , the oyster has covered the bead with layers of nacre
，形成人工養殖的珍珠。一般兩年就可以收珠了。 - As a result , nacre thickness is sometimes just a cosmetic layer that 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。 - Fine pearls do not have any flaws or spots in the nacre : it has an even , smooth texture
在這些透明的真珠質層上反射和衍射所形成的。有些珍珠會有 - Recent advances in nacre used as bone implant are reviewed in this paper
摘要珍珠層是一種天然的納米生物陶瓷材料，一直是生物礦物材料學者研究的焦點。 - Pearls are organic gems , created when an oyster covers a foreign object with beautiful layers of nacre
珍珠是有機寶石，是一些雙殼的軟體動物的產物。 - It is likely that nacre will become a good candidate for bone graft substitution in future
認為珍珠層是一種很有前途的骨植入材料，提出了今后研究的方向。 - The pearl continues to grow in size as thousands of layers of the nacre continues to build around the pearl
尤為特別的是，它的銀光之上有一層閃爍的彩光，美艷而神秘。 - Cultured and natural pearls will feel slightly rough , like fine sandpaper , because of the texture of natural nacre
。天然珍珠和人工養殖珍珠會有些許粗躁的感覺，如同細砂紙般，那是真珠質的天然觸感。 - When selecting a pearl , consider that the larger the pearl , the more nacre it has , so it will also exhibit even more luster
這些珍珠層是平行的，剖面呈同心圓結構。每一珍珠層都十分光滑，而且是半透明的。 - Not only then are the smaller , less robust creatures but the pollution in the water changes the color of the nacre and changes the color of the pearl
珠蚌不但更小，生命力更弱，受到污染的水會改變真珠質和珍珠的顏色。 - It's difficult to see nacre in a sentence. 用nacre造句挺難的
- The pearl begins when the mollusk secretes a lustrous substance , called nacre , that coats the irritant and protects the soft internal surface of the mollusk
得天獨厚的自然條件，配合來自珍珠養殖業的翹楚日本的高超技術，是澳洲南洋珍珠高品質的保證。 - 5 a round to near - round ; moderate / low luster ; thin nacre ( less than . 2 of total nacre ) ; 60 - 70 % inclusion free surface ; good to moderate matching
5 a圓到接近圓的程度，中/低的光澤，簿的珠層（小于0 . 2的珠層含量） ， 60 % - 70 %的表皮光潔度，良好到中等的匹配。 - A tiny bead is implanted in an oyster , so that it is gradually coated in layers of a beautiful , pearlescent substance called nacre which build up to create a lustrous pearl
尤其是在近兩年的日本及歐美，珍珠飾品含蓄內斂的氣質吸引了不少知性女子，成為時尚飾品的一大主流。 - 7 commercial quality near - round to off - round ; moderate / low luster ; thin nacre ( less than . 2 of total nacre ) ; moderate to heavy inclusions ; good to moderate matching
7經濟級的質量，接近圓到不圓，中/低光澤，簿的珠層（小于0 . 2的珠層含量） ，中等到大量的瑕疵，良好到中等的匹配。 - As an oyster creates a pearl , the layers of nacre do not always adhere smoothly . sometimes spots and bubbles can appear in the layering process
由于光的反射，使珍珠看起來明亮有光澤由于光線的透射，使珍珠看起來晶瑩剔透由于折射，光線會生產干涉現象，從而產生了變幻不定的色彩。 - 2 aa + perfect round ; excellent luster ; thick nacre ( . 5 of total nacre or better ) ; 90 - 95 % inclusion free surface ; excellent matching ; top 5 % of a pearl farm ' s harvest
圓度極高，極好的光澤，厚的珠層（ 0 . 5或以上的珠層含量） ， 90 - 95 %的表皮光潔度，極好的匹配，珠農收成中最好的5 %部份。 - 1 aaa perfect round ; excellent luster ; thick nacre ( . 7 of total nacre or better ) ; 95 % inclusion free surface or better ; excellent matching ; top 1 % of a pearl farm ' s harvest
1 aaa圓度極高，極好的光澤，厚的珠層（ 0 . 7或以上的珠層含量） ， 95 %的表皮光潔度或更高，極好的匹配，珠農收成中最好的1 %部份。 - The quality of pearls is judged by the orient , which is the soft iridescence caused by the refraction of light by the layers of nacre , and lustre , the reflectivity and shine of the surface
珍珠的價值主要由它的光澤顏色大小有無表面的缺陷和形狀來決定的，其中光澤為最重要的因素。其特有的光澤是光 - 2 ) the carotenoids successfully probed in nacre by in situ resonance raman spectra , are considered one of the most important factors responsible for the coloration of nacre and pearl
2 )采用共振拉曼光譜首次成功地原位探測到三角帆蚌及馬氏珍珠貝珍珠層中類胡蘿卜素的存在，并提出類胡蘿卜素是珍珠層致色的重要原因之一。 - 3 aa very round ( less than 5 % gradation ) ; good luster , good nacre ( . 35 of total nacre or better ) ; 80 - 90 % inclusion free surface ; good / excellent matching ; top 20 % of a pearl farm ' s harvest
3 aa非常圓（少于5 %的那部份的等級） ，良好的光澤，良好的珠層（ 0 . 35或以上的珠層含量） ， 80 % - 90 %的表皮光潔度，好/極好的匹配，珠農收成中最好的20 %部份。
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