And all this is to help to address a broad range of neurological diseases and injuries.

所有这些都旨在帮助我们,研究很广的范围的神经系统疾病和损伤。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

So you don't want to put in a negative energy, that's not going to help you out, you need to put in positive energy to get an electron out of the system. So that's why you'll find binding energies are always negative, and ionization energies are always going to be positive, or you could look at the equation and see it from there as well.

因为这对电离没有帮助,你需要一个正的能量,使得电子脱离这个系统,这就是为什么你会发现,结合能总是负的而电离能总是正的,或者你们看这个方程也可以发现这一点。

麻省理工公开课 - 化学原理课程节选