But al-Shabab, which follows an ultra-conservative form of Islam, opposes the moderate version of Islamic law the president and his U.N.-supported government are likely to put in place.

VOA: standard.2009.04.17

So let's actually just simplify this to the other version of the Rydberg constant, since we can use that here.

除以n初始的平方，我们把它简化成,另一种形式的Rydberg常数。

麻省理工公开课 - 化学原理课程节选

So it's a more specific version of the equation where we have the n final equal to 2.

当我们令n等于2时,使这个这个方程变成更具体的版本。

麻省理工公开课 - 化学原理课程节选