We call the bonds between these atoms covalent bonds.

我们将这些原子之间作共。

Normally, different molecules are connected by covalent chemical bonds between their atoms.

通常情况下，不同分子通过原子间共化学相。

For example, take molecules, atoms held together by covalent bonds.

例如分子中原子有着共联系。

SPNs do often contain conventional polymers that are held together by covalent bonds.

SPN通常含有由共在一起普通聚合物。

Now, remember that in a covalent bond two electrons are shared, usually unequally, between atoms.

那么，通常，在共里，两个电子在原子之间被不平等共享。

Those crosslinks are generally also formed from covalent bonds, which are interactions where atoms share electrons and generally require a chemical reaction to make or break.

这些交联通常也是由共形成，这些共是在原子共享电子相互作用下形成，通常需要化学反应才能使之形成或断裂。

Diamonds are hard because of their molecular structure, each carbon atom forms four covalent bonds with the atoms around it, which forms an exceptionally hard crystal structure.

金刚石坚硬是因为其分子结构，每个碳原子与相邻原子形成四个共，从而形成极其坚硬晶体结构。