mind you
We use this expression to introduce an idea or fact that contrasts with the previous idea in some way.
我們用這個(gè)表達(dá)來引入一個(gè)想法或事實(shí)，在某種程度上與之前的想法形成對比。
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個(gè)小時(shí)才跑完倫敦馬拉松。注意，她已經(jīng)80多歲了.
B：Well then, it's amazing that she finished it at all.
那她能完成就真的很不可思議了。