北师大版高中英语必修5 Unit15 Lesson1:Three months ago,when my manager told me that I would be laid off, my mind went blank and my heart swelled with anger.中mind与heart有什么区别？

mind: 是抽象的概念，指“the element of a person that enables them to be aware of the world and their experiences, to think, and to feel 头脑，想法”。也可引申为：“智力，理解力”。

例如：I need a walk to clear my mind.我需要散散步来清醒一下头脑。

My grandmother's mind is failing.我祖母的智力正在消退。

heart: 是具体的器官，指 心脏。可引申为：“regarded as the centre of a person's thoughts and emotions, especially love or compassion 心智；感情（尤指爱心或同情心）。还可引申为“情绪，心情(feeling,mood)”或“勇气；热情”

例如：Did you know he had a weak heart? 你知不知道他心脏不好？

My advice would be to follow your heart. 我给你的建议是跟着感觉走。

He has a kind heart.他心地善良。

They found him well and in good heart.他们发现他身体健康心情愉悦。

They may lose heart as the work mounts up.工作量不断增加可能会使他们泄气。

I know you have a good heart. But I don't know what kind of brain you have because you showed that your mind is blank!
我知道你有一颗善良的心，可是我不知道你的大脑是何物，因为你显示出你的意识是一片空白！

在课文中，本句意思是：三个月前，当经理告诉我我下岗时，我的脑海一片空白，我的心里充满了怒火。