covalent bond

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What's the definition of the covalent bond?
共价键的定义是什么？
The ability of an atom to attract electrons, and in particular, in a covalent bond.
原子对电子的吸引能力，特别是在共价键中。
A covalent bond is any time we have a pair of electrons that is shared between two different atoms.
所谓共价键就是我们有两个原子,共用一对电子。

He said that the percent ionic character, and this is within a bond, not for a compound, for a covalent bond.
他提到离子百分数，是指一根键中，并非一个分子中。
麻省理工公开课 - 固态化学导论课程节选
A covalent bond is any time we have a pair of electrons that is shared between two different atoms.
所谓共价键就是我们有两个原子,共用一对电子。
麻省理工公开课 - 化学原理课程节选
Likewise, the element that is a good electron acceptor in an electron transfer reaction is going to be the element that is going to hog the electrons in a covalent bond.
同样的，这个元素在一个电子转移反应中,是个很好的受赠者它将成为在共价电子,中吸引电子的元素。
麻省理工公开课 - 固态化学导论课程节选

Avocados have become popular in restaurants and homes because, in food-science terms, they act as a "covalent bond" with other ingredients.
NPR: What's in a Name? The Avocado Story

a chemical bond in which two atoms share one or more pairs of electrons that hold them together

a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms