母

Study is aimed at box threads of Φ177.8mm drill collar to analyze and calculate drill collar box thread with different stress-relief grooves using finite element method, the stress concentration of thread end of 3 types of box threads is gained under same boundary condition and load.

以177.8mm钻铤母螺纹接头作为研究对象，用有限元方法对加工有不同应力减轻槽的钻铤母螺纹接头进行了分析计算，得出了3种不同母螺纹结构在相同边界条件和载荷作用下螺纹消失端的应力集中情况。

Widely used in PE, PP, PVC and other plastics processing, lubricants, release agents, energy-saving agent; are thick plastic masterbatch, fiber masterbatch, filler masterbatch, plastic processing polyolefin dispersant; is the production of cable materials, hot sol, wax products, paints, rubber, ink, paint, shoe polish, such as the ideal processing aids.

广泛应用于PE、PP、PVC等塑料加工的润滑剂、脱模剂、节能剂；是塑料浓色母料、丙纶母料、填充母料、聚烯烃塑料加工的分散剂；也是生产电缆料、热溶胶、蜡制品、油漆、橡胶、油墨、涂料、鞋油等的理想加工助剂。

Inthe whole process, the oocytes, nurse cell and follicle cell morphology change. Inoocyte yolk formation and growth, the number of its nuclear trophoblast cell nucleoli,lamphrush chromosome with a strong synthetic material; oocytes also some syntheticmaterial; follicle cells in the yolk protein synthesis, provide access to exogenous yolkprotein.

在卵子发生的整个过程中，卵母细胞、滋养细胞及滤泡细胞形态均有明显变化；在卵母细胞生长及卵黄形成期，滋养细胞核内的多核仁现象、灯刷染色体与旺盛的物质合成有关；卵母细胞本身也合成一些物质；滤泡细胞参与卵黄蛋白的合成，并为外源性卵黄蛋白提供通道。

When the population of interest is large,a well-selected sample can generate more accurate and informative results about the population than information from the entire population.

当母群体过大时，经过挑选的样本比直接从母群体中做分析更能够代表母群体统计学第14页为何使用采样？1。普查所费时间长，不具时效性

Membrane potential, intracellular Na+, K+, Cl, H+ activities and Na+, K+ transference number in toad oocytes were measured in vitro by using conventional and ion-sensitive microelectrodes during the insulin-induced oocyte maturation.

近年来，胰岛素及胰岛素样肤类物质在卵母细胞成熟中的作用越来越引起人们的关注。EI一Etr等(1979)用非洲爪蟾卵母细胞作实验，发现胰岛素及其类似物具有促进卵母细胞成熟分裂的作用。

Male dolphin, female dolphin, he-bear, she-bear, male wolf, female wolf

短语公/母熊，公/母豚，公/母狼。

He said also how at the end of the second month a human soul was infused and how in all our holy mother foldeth ever souls for God's greater glory whereas that earthly mother which was but a dam to bear beastly should die by canon for so saith he that holdeth the fisherman's seal, even that blessed Peter on which rock was holy church for all ages founded.

据阿威罗伊与摩西。迈蒙尼德之见解，或入浴时亦能怀孕。彼又云：次月底，胎儿被注入一具人类的灵魂，我等神圣之母为了天主更大之光荣，永远庇护所有灵魂。而地上之母仅只是一头下仔的母兽而已，依照教规理应死去。

As the van was moving, he turned on the lights and waved to fans. Not far, there were any crowd of fans and he turned on the lights once more to waved to them before the van sped off.

在保母车驶离停车场时，Leon将车上的灯亮起，和歌迷挥手，然后关掉，但是保母车走不远，亦有另一些歌迷站著，Leon再将灯开著和歌迷挥手后，保母车才疾风而去。

Diamonds began growth when "Jiangnan continent" combined to Yangtze craton, the growth and residence average temperature T〓 was about 1200℃; Diamonds were mutil-stages growth and interruption caused by temperature and pressure varied during Yangtze craton activities; Diamonds were etched when the magma did not erupt on the surface and form failed magma in mantle; during the later growth term T〓＜1050℃, the type ⅠaA diamonds formed unclear and growth; Before the host magma erupted T〓＜0.5Ma, T〓A＜850℃, the type Ⅰb diamond formed unclear and growth; Few diamonds were brittle deformation during growth term, some were plastic deformation after growth; when the host magma erupted on the surface and weathered to alluvial deposit, diamonds surfaces formed green spots caused by irradiation, then most of green spots became to brown spots during a mid-temperature metamorphism; modern river reform it to alluvial deposit in the minute valley again.

在扬子地台&江南古陆&克拉通化时，金刚石开始生长，其生长与保存的平均温度T〓在1200℃左右；期间由于地台的活动，生长的温度压力条件发生了多次变化，使金刚石出现多次生长、停顿；夭折的母岩上侵活动使金刚石受到熔蚀作用；在金刚石形成的晚期，T〓值下降到1050℃以下，出现了另一次金刚石的生长期，在临近金刚石母岩上侵时T〓＜0.5Ma，温度进一步降到850℃以下，使Ⅰb型金刚石得以保存；在金刚石形成期间还有过碎性变形发生；金刚石形成后部分样品经过了塑性变形；金刚石在上侵过程中，遭受了强烈的熔蚀；在母岩露出地表，形成沉积砂矿时，受到了放射性物质的辐照，先形成表层的绿色斑点、壳层，后经过中低温的热变质作用，大部分绿色转化为褐色；现代河流作用对沉积砂矿进一步改造，形成现在的细谷型砂矿。

Methods: Oocytes in the GV stage were separated from ovary by squeezing method. In mouse germinal vesicle GV stage, the expression of ATP8 gene in the mitochondria in the single oocyte was detected by RT-PCR, in which, cDNA was synthesized with two methods: one was the single GV-stage oocyte directly to be placed RT, the other was to perform RT after eliminating mtDNA and nucleus DNA with the EeoR Ⅰ enzyme and Dnase. And the product of RT-PCR was cloned and sequenced.

应用挤压法从卵巢中分离获得生发泡期(germinal vesicle， GV)卵母细胞；用RT-PCR检测GV期单个卵母细胞中ATP8基因的表达：其中cDNA的合成分两种方法进行：一是将GV期单个卵母细胞直接进行RT合成cDNA，二是先用DNA酶加EcoR Ⅰ酶祛除mtDNA和核DNA后再进行RT；回收产物构建克隆质粒并测序。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐