Charlson had been puzzling over what unknown particles provide the nuclei on which moisture condenses, forming clouds.

Charlson一直对给空气中的湿气冷凝成云提供凝结核的未知粒子存有疑惑。

youdao

What we're going to do in forming a molecule is just bring these two orbitals close together such that now we have their nucleus, the two nuclei, at a distance apart that's equal to the bond length.

我们在形成一个分子时要做的就是，把这两个轨道放到一起，这样我们有他们的原子核，两个原子核，它们之间的距离为键长。

youdao

Polar nuclei The, usually two, haploid nuclei found midway along the EMBRYOSAC, forming a binucleate central cell. They may fuse to form the diploid definitive nucleus.

通常指两个位于胚囊中间的单倍体核，他们可能融合形成一个二核的中央细胞。

youdao

What we're going to do in forming a molecule is just bring these two orbitals close together such that now we have their nucleus, the two nuclei, at a distance apart that's equal to the bond length.

我们在形成一个分子时要做的就是,把这两个轨道放到一起,这样我们有他们的原子核，两个原子核，它们之间的距离为键长。

麻省理工公开课 - 化学原理课程节选