External thread on lens barrel is matched and locked to internal thread on the lens seat.

Nuts have internal ( or female) threads to match those of the Bolt.

螺母上有内（或阴）螺纹，与螺栓上的螺纹相啮合。

Three dimensional FE simulation of ball spinning of inner grooved copper tubes

两端带阴螺纹管接的直通旋塞内螺纹铜管滚珠旋压三维有限元模拟

The isolation procedure included ammonium sulfate fractionation and chromatography on DEAE-cellulose.

分离操作包括硫酸铵沉淀，DEAE-纤维素和CM-纤维素层析。

A Study of DEAE Ion Exchange Chromatography for the Purification of Hen's Yolk IgG

用离子交换层析法纯化鸡蛋黄IgG

Conclusion The prepared magnetic nanoparticles coupled with DEAE can be used to purify high purity plasmids.

结论在纳米磁性粒子外包裹上DEAE基团，可以提纯出高纯度的质粒。

Phase-separated polymerization ( ii) synthesis of functional microspheres with DEAE group

相分离聚合法：（Ⅱ）二乙氨基乙基型共聚功能微球的合成

Concentrated ( C) was separated by DEAE-cellulose chromatography column.

C液经DEAE&纤维素柱层析分离，其峰Ⅱ为电泳纯胰高血糖素（D）。

IgG was isolated from human serum by DEAE-Cellulose ion exchange chromatography.

用DEAE-纤维素离子交换柱色谱法从人血清中能分离出IgG。

Methods: The polysaccharide was got by the extraction, DEAE chromatography etc.

方法：依次用水提取、过滤、去蛋白、DEAE纤维素层析、冷冻干燥获得大蒜多糖；

Unmated male, female moths, mating female moths on the choice of 10 fractions of coefficients were 28.06%, 25.56%, 29.44%, and 11 are very similar fractions.

未交配的雄、雌蛾、交配过的雌蛾对组分10的选择系数分别为28.06%、25.56%、29.44%，与组分11非常相似。

The study proves that there is a gender difference between male and female in their choice of the complimented topics and CR strategies, and female show high frequencies of addressing compliments.

研究表明，男性和女性在称赞语的使用、话题的选择及应答方式上都存在差异。与男性相比，女性使用称赞语的频率更高。

Female mate choice co evolved with trait exaggeration or females that are choosy gain direct benefits.

性别间选择促使用来吸引异性的一些特征得到发展。雌性动物的配偶选择或与所选择的特征协同进化，或可以从选择中得到直接的利益。

selective proceptivity, mate choice, female choice, sexual choice.

选择性感知，配偶选择，雌性选择，性选择。

The morphological characters and female mate choice of tiger frogs ( Rana rugulosa) during the breeding season

繁殖期虎纹蛙形态特征和雌性性选择

So it's not only remarkable to find that female fur seals are choosy, but this also suggests that female choice may be more widespread in nature than we previously thought.

研究不但发现了雌海狗在择偶时的主动性，也预示着自然界雌性动物在择偶时远比人们想象的积极。

Female Choice and Evolution of Male Songs in Birds

雌性选择与雄鸟鸣唱的进化

Indeed, so many female employees made this choice that they were collectively dubbed "the rush-to-get-pregnant tribe".

因为有很多女性员工选择快速怀孕，所以就出现了一个新的群体，被称为“闪孕族”。

But the conformation of P ( DEAM co MAA) in dilute aqueous solution shows a loose extended form due to polymer dilution effect in all of pH range when the molar fraction of DEAM in P ( DEAM co MAA) is higher than 8.00%.

当共聚物中DEAM含量大于8.00%（molarfraction）时，由于高分子的稀释效应，P（DEAM-co-MAA）在pH2～10范围内表现为较为松散的伸展构象。

The effect of DEAM contents and pH on the conformation of P ( DEAM co MAA) may find some uses in the design and synthesis of novel sensitive gels.

P（DEAM-co-MAA）构象随其组成和pH变化的这种性质有可能在新型敏感性凝胶的合成设计上获得应用。

How ofen do we plant the seed of a beautiful deam in the fertile soil of our minds, and then dig it up?

我们在心灵的沃土中，播下一颗美好梦想的种子后。是不是不待它生根发芽就将它掘出土壤？这样的事情每隔多长时间我们就会做一次呢？