汤包的芯里面没有姜。

Soup steamed buns without ginger inside.

youdao

现在，你们看过了这些幻灯片，它们的芯块，进入大头针里，然后变成组件。

Now you saw some of these slides where pellets go into pins which are then made into assemblies.

youdao

youdao

That happens because of space issues that you were asked to do that, because you can always assume that all of the core orbitals are already going to be filled.

这是出于空间的考虑,要求你这么做是因为，你总是可以假定所有的,芯电子轨道都已经填满了。

麻省理工公开课 - 化学原理课程节选

So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

麻省理工公开课 - 化学原理课程节选

we very rarely would see these core electrons actually being involved in any type of a reaction.

我们极少见到芯电子,会参与任何类型的反应。

麻省理工公开课 - 化学原理课程节选