Diatomic mean it's di atomic, it's made up of two atoms, and homonuclear means that those two are the same atoms.

双原子意味着它是两个原子，它由两个原子组成，同核意味着这两个原子时相同的原子。

麻省理工公开课 - 化学原理课程节选

According to this theory, the atoms consist of a positively charged nucleus surrounded by a stream of electrons kept together by attractive forces from the nucleus.

根据这个理论，原子由一个带正电荷的核组成,由于来自核的吸引力,电子流围绕在核的周围。

麻省理工公开课 - 固态化学导论课程节选

And where we had left off was we were going to start one example of thinking about now where we have a heteronuclear diatomic molecules, so two different atoms in terms of forming the molecule.

我们还剩下一个,异核双原子分子的例子没讲,这里组成分子的原子，是不同的。

麻省理工公开课 - 化学原理课程节选