Many involving how people act while in a manic or depressive state.

很多都涉及到人们在躁狂或抑郁状态下的行为。

In a manic state, people can feel energetic, overly happy or optimistic, even euphoric with really high self-esteem.

在躁狂状态下，患者会觉得精力充沛、过度开心或乐观，甚至欣快并且自尊心膨胀。

Think she's in, like, a manic state. - Is she okay?

她好像处在狂燥期 -她没事吧？

While a brain in a manic state shows a lot of increased activity, making it hard for that person to calm down or focus or sleep.

处于躁狂状态的大脑表现出大量的活动增加，使该人难以冷静下来、集中注意力或入睡。