但这个形象不是固定改变的，你可以改变它的。

But this picture isn't fixed and immutable. You can change it.

youdao

你可以改变它 。

You can change it.

youdao

如果你想从别的继承，你可以改变它。

If you want to inherit from something else, you can change it.

youdao

This means you can vary the neutron number without changing chemical identity, because chemical identity is fixed by the proton.

这表示你可以改变中子数,而不会改变它的化学特性，因为化学特性是由质子决定的。

麻省理工公开课 - 固态化学导论课程节选