You will be learning about this soon (evil laughter).

你很快就会知道这一点（邪恶的笑声）。

Evil laughter poured out of hidden speakers.

邪恶的笑声从隐藏的扬声器中传出。

A lightning bolt roars as Lucas breaks out into evil laughter- after all these years, his plan is complete.

一道闪电轰鸣，卢卡斯发出邪恶的笑声——这么多年过去了，他的计划已经完成。