DNA methylation is the only known covalent modification of DNA molecule. It is accomplished by transfer of the methyl group from S-adenosyl methionine to 5 position of the purine ring of cytosine.

Through comparing the valence electron structure in austenitic crystal cell among all kinds of alloys, the strong covalent bond of austenitic crystal cell valence electron structure is thought as a main factor to influence the stability of austenite.

对各种合金奥氏体晶胞价电子结构进行比较后，认为影响合金奥氏体稳定性的主要因素是奥氏体晶胞价电子结构的强共价键。

After calculating the electron energy difference of strong covalent bond in austenitic crystal cell between alloy steel and 45 carbon steel, a formula to calculate LPT value in C Curve of low alloy steel was put forward.

通过计算合金奥氏体晶胞强共价键电子能量Ee与45钢奥氏体晶胞强共价键电子能量Ee（45）的差，提出计算低合金钢C曲线的珠光体孕育时间对数值（LPT）公式。

The results show that intramolecular coordination ability bears a parallel relationship with stabilization energy, bond parameter and charge transfer. For these coordination compounds intramolecular interaction is mainly a σ-bonding and the coordination force is essentially covalent interaction.

结果表明，分予闻配位强弱与稳定化能、键参量、电荷转移成平行关系，分子间作用键主要是σ配键，揭示了配位力的本质是授受电子的共价作用。

From these results, the potential function, which contains both ionic and covalent interaction, was established. In order to fit the parameters of the potential function, and the energy surface of these systems was constructed by energy simulation.

基于此，本文建立了能同时反映离子型与共价型相互作用的势函数，并通过体系总能量模拟建立的势能曲面拟合了其他参数。

Through covalent interaction with target protein, small molecular SUMO affects target proteins' stability, cellular localization and interactions with other proteins to regulate a series of important processes including transcriptional regulation.

小蛋白分子SUMO通过与靶蛋白的共价连接，影响了靶蛋白的稳定性、细胞定位、蛋白质间的相互作用等，参与了转录调控等重要生理过程。

Preparation and Self-Assembly Surface-Functional Silica Nanoparticles through Covalent Interaction

表面功能化SiO2纳米微粒的制备及其共价组装

The moiety can provide covalent interaction with sugars.

其含有硼酸部分，可以与醣类分子以共价键键结。

Cooperative Non-Covalent Interaction for Organic Molecular Recognition and Self-Assembly

有机分子识别和聚集体组装中的非共价键协同作用

First, the characteristic three-dimensional structure is vital for the biological function of the protein, while the native folded structure of a protein is dictated by its covalent structure, that is, its primary amino acid sequence.

首先，蛋白质的三维结构特征对其生物学功能有着巨大的影响，而蛋白质的空间构象直接取决于其一级结构。

The volume of lipophilic group is the sum of the covalent radius spheres of all C and H atoms in the lipophilic group.

亲油基体积是亲油基中碳、氢原子共价半径的球体体积之和。

The application and calculation of the valence covalent radius and the electronegativity of the new valences in the transition elements(ⅳ)

过渡元素价态共价半径及其新价态电负性的计算和应用（Ⅳ）

A new formula, which is applied to the calculation of valence covalent radius of the transition metal elements, is presented.

提出了计算过渡元素价态共价半径的公式；

In this paper, we give a experiential calculating formula of atomic covalent radius, the results are satisfied.

本文给出了一个计算原子共价半径的经验公式，其计算结果与实验值基本相符。

He's famous for a lot of things, one of which is covalent bonding.

他有许多著名的发现，其中一个便是共价键。

Well, with covalent bonding, it's not so simple.

但对于共价键就没这么简单了。

Synthesis of The Functional Resin Using to Covalent Bonding to Protein

一种能与蛋白质进行共价键合的功能树脂的合成

My new house is to have nothing Gothic about it, nor pretend to call cousins with the mansion-house.

我的新房子绝非哥特式亦称不上大厦。

The specialization of male morphological structures in courtship behavior and mating behavior of 5 tribes, 13 genera, 34 species were discussed.

列举了芫菁亚科5族13属34种芫菁的性行为，并讨论了雄成虫在形态构造上对求偶和交配行为的适应性行为。

Any of numerous small bright-colored birds of Central and South America having short bills and elaborate courtship behavior.

产于中美洲和南美洲的多种色彩斑澜的短喙小鸟，求爱行为复杂。

Courtship behavior is an instinct in animals and plays a very important role in reproduction.

求偶行为是动物的一种本能，是动物繁殖的一个重要环节。