碳酸钙

The innermost layer of mollusc shells is called mother-of-pearl. It is a biomineral consisting of calcium carbonate and organic material.

在最里层的软体动物被称作珍珠母，它是一种组成碳酸钙和有机物的矿物质。

A real pearl is a hard, rounded object composed of calcium carbonate, created within a living mollusk

真正的珍珠是一个坚硬的，圆形物体，由碳酸钙组成，由活的软体动物所创造。

The model of periodic bond chain was used to explain the formation of the multilayer structure.

利用周期键链理论模型解释了层状结构碳酸钙聚集体的形成过程。

Researches are made on the hydrochloric acid process manufacturing feedgrade dicalcium phosphate from Kaiyang phosphate rocks, with a compound of muriate of potash 〔 or muriate of sodium〕as well as calcite as defluorinating agent.

对贵州开阳磷矿用盐酸法生产饲料级磷酸氢钙的生产工艺，应用氯化钾、碳酸钙复合脱氟剂进行了实验研究，得出了用复合脱氟剂脱氟的操作控制要点。

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。

S., Effect of Nano- and Micro-Silica Fillers on Polyurethane Foam Properties.

纳米碳酸钙对硬质聚氨酯泡沫塑料力学性能的影响。

In this study, homo- and co-PP were modified by nano- calcium carbonate and the effect of additive on scratch resistance evaluated.

在本研究中，均聚和共聚PP用纳米碳酸钙进行改性，评价了添加剂对耐刮擦性的影响。

It is found that the nucleation mode can be changed with the different nano-CaCO3 content in the PS.

研究发现，PS中纳米碳酸钙的含量不同会影响泡孔的成核方式。

The results showed reasonable crosslinked PP was benefit to the improvement of the cell structure, and the addition of nucleator as nucleating sites could increase the cell density.

研究表明，适度交联的聚丙烯有利于改善泡孔的结构，加入的纳米碳酸钙作为异相成核点，能够提高制品的泡孔密度。

With azodicarbamide as blowing agent and nano-CaCO3 as nucleator, the cell morphologies of non-crosslinked and corsslinked polypropylene foams were studied. The effects of different contents of crosslinking agent on the flexural strength and non-notched impact strength of PP foamed compound were also studied.

以活性纳米碳酸钙为成核剂，偶氮二甲酰胶为发泡剂，研究了未交联和交联聚丙烯发泡的泡孔结构，同时还研究了不同的交联剂含量对聚丙烯发泡制品弯曲强度和无缺口冲击强度的影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。