be mad about/with/at:介词的拿捏
I'm pretty mad about it, I can tell you. (我可以告诉你,我对此非常生气。) [柯林斯高级学者辞典]
I'm pretty mad about it, I can tell you. (我可以告诉你,我对此非常生气。) [柯林斯高级学者辞典]
Prune rambling roses when the flowers have faded. (当花朵凋谢时,修剪蔓生的玫瑰。)[柯林斯高级学者辞典]