The disadvantage of class B operation is a large amount of "crossover distortion", which occurs when one tube of the push-pull pair cuts off and the other turns on.

的缺点B级操作大量的“交越失真” ，这发生在一个管推挽对切断和其他打开。

youdao

Look, you're smart enough probably most of you to pull off some sort of B without breaking into a sweat, or at least not a significant sweat.

听着，你们也许足够聪明大多数人,最终不费力的得到80分，或是至少花点功夫。

耶鲁公开课 - 死亡课程节选