Um, every day, I mean she was very highly strung.

每天，她都非常敏感。

" To be highly strung" means to be a little bit nervous and to be upset easily.

“To be highly strung”的意思是有点神经质，很容易心烦意乱。

She was very very highly strung, so you had to be careful what you said next to her.

她非常非常敏感，所以你在她旁边说话要小心。

He was a very highly strung young man.

他是一个非常紧张的年轻人。