Frequency level, time level, speed level.

频率级别，时间常数，速度级别。

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In fact, the whole planet was at a different frequency level.

实际上，整个地球在一个不同的频率水平上。

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If you hold down a row switch, LED flashes every 2 seconds, a fast frequency level, then the fourth panel status lights will flash once.

若连续按住开关，每2秒钟LED闪烁频率会快一个级别，此时面板第四个状态指示灯会闪烁一下。

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So, if we start instead with talking about the energy levels, we can relate these to frequency, because we already said that frequency is related to, or it's equal to the initial energy level here minus the final energy level there over Planck's constant to get us to frequency.

如果我们从讨论能级开始，我们可以联系到频率上,因为我们说过频率和能量相关,或者说等于初始能量,减去末态能量除以普朗克常数。

麻省理工公开课 - 化学原理课程节选

So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.

把2代入到这里，所以得到1除以,这就是我们最终的方程，这叫做Balmer系，以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。

麻省理工公开课 - 化学原理课程节选

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