Again, the reason for that is because the energy only depends on the n value here, it doesn't depend on l or on m.

因为，能量,只和n的值有关，与l和m的值无关。

麻省理工公开课 - 化学原理课程节选

Y You don't want to rename them L and R or X and Y right because you want to call them left and right.

你不想把它们重命名为L和R，或者X和,因为你想叫它们为left和。

哈佛公开课 - 计算机科学课程节选