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珍珠

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This means the nacre is thicker but it means that most pearls are usually not perfectly round.

这是指珍珠较厚但并不意味着最通常珍珠滚圆。

Pearls are a result of the reaction of mollusks irritation to nacre which is made up of tiny crystals of calcium carbonate.

珍珠是一种软体动物反应的刺激而珍珠是由微小的碳酸钙晶体了。

Also look for any flaws or spots in the nacre: the best pearls have an even smooth texture.

还找任何瑕疵或景点的珍珠珍珠最好有一个更顺畅纹理。

In this paper, we summarize relevant studies on the microstructures, mechanical properties, and mechanical modeling of nacre. Problems in the study of nacre are pointed out and discussed briefly.

本文从珍珠母的微结构、实验研究以及力学模型3个方面对珍珠母的研究现状进行了概述,并指出目前研究中一些仍待解决的关键问题。

Any abrasive substance can wear off the nacre coating and leave a very plain looking pearl.

任何物质可磨料磨损的珍珠层,并留下一个很朴实的寻找珍珠

Microstructure of nacre is significant to understand the behavior of nacre and the biomimetic designing of materials.

本文利用扫描电镜原位观察了受拉伸载荷作用下珍珠层中裂纹的萌生及扩展方式,并结合SEM和TEM技术研究了贝壳珍珠层微观组织结构,探讨了裂纹扩展过程中的增韧机制。

As the defense mechanism, the oyster production is called the nacreous layer one material result form nearby the intruder the lamination stack, the creation pearl.

作为防御机制,生产的牡蛎被称为珍珠层材料的结果之一形式附近的入侵者的复合叠加,创造珍珠

Nacreous layer of shell ; pearl ; FTIR spectrum ; frequency shift

贝壳珍珠层;珍珠; FTIR光谱;频率位移

The FTIR spectra of aragonites from different origins, which include aragonites from nacreous layers of pearls and bivalve shells, coral skeletons and natural inorganic aragonites, are measured and comparatively analyzed.

对3种类型的文石即珍珠和贝壳珍珠层、珊瑚及天然无机文石的FTIR光谱进行了测量和对比分析。

The results show that the ν_2 vibrational frequency of aragonites from nacreous layer has the mean value of 863.6 cm~(-1 )which is about 7.9 cm~(-1)and 9.1 cm~(-1), higher than that of aragonite from coral skeleton and natural inorganic aragonite respectively.

结果表明,珍珠和贝壳珍珠层文石的ν2频率平均值为863.6 cm-1,较珊瑚及天然无机文石存在明显的蓝移现象,蓝移值分别为7.9 cm-1和9.1 cm-1。

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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。