mind you
We use this expression to introduce an idea or fact that contrasts with the previous idea in some way.
我们用这个表达来引入一个想法或事实,在某种程度上与之前的想法形成对比。
A:It took my friend 10 hours to finish the London marathon. Mind you, she is over 80.
我的朋友花了10个小时才跑完伦敦马拉松。注意,她已经80多岁了.
B:Well then, it's amazing that she finished it at all.
那她能完成就真的很不可思议了。