So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.

所以，如果我们想使电子,从稳态到达不够稳定的状态，我们需要引入一定数量的,能量到系统中，即自由电子和束缚于金属的,电子的能量差。

麻省理工公开课 - 化学原理课程节选

It suggests that London set Scottish rates at 10p less than those for Britain as a whole, and cut its block grant by the amount that the difference in rates might be expected to raise.

ECONOMIST: Devolution finances

The decision to use one or the other will depend on the amount of the valuation difference, for what purpose it will be used, and how willing the client is to fight if necessary.

FORBES: Putting A Value On Your Life Insurance Policy

Others pointed out that they will make little difference to the amount of junk mail people receive.

BBC: NEWS | Technology | Top UK sites 'fail privacy test'