很简单的，这个能量等于初始能量减去末能量。

This energy here is very simply the energy of the initial state minus the energy of the final state.

youdao

在初始能量具有足够大的负能量情况下，解在有限时间发生爆破。

The solution blows up in finite time under initial energy that is negative enough.

youdao

给出了当初始能量小于“临界值”时方程解的生命跨度的上界估计。

And the super estimate of this lifespan is given when the initial energy of this equation is less than "critical value".

youdao

So this delta energy here is very simply the energy of the initial state minus the energy of the final state.

很简单的，这个能量差等于,初始能量减去末能量。

麻省理工公开课 - 化学原理课程节选

Because here what we have is some atom that we're studying, in the case, it's going to be a gas, and we hit it with a photon that has some incident energy.

因为这里我们要研究的是一些原子,在这种情况下，一般是气态的，然后我们令一个,具有一定初始能量的光子打上去。

麻省理工公开课 - 化学原理课程节选

So we have four choices in terms of initial and final energy levels, and also what it means - in terms of the electron -- whether it's gaining energy or whether it's going to be emitting energy?

我们有这四个选项,各有不同的初始能量和末能量,它都是按照电子来说的,不管是失去能量还是得到能量？

麻省理工公开课 - 化学原理课程节选