可能她知道存在的困难吧？

She is aware of the difficulties, presumably?

youdao

我知道她的婚姻存在一些根本问题，因为她一年前曾向我吐露过。

I knew she had some fundamental problems in her marriage because she had confided in me a year earlier.

《柯林斯英汉双解大词典》

她本来可以是任何人，我知道她的存在，但现在来说，太迟了。

She could have been anyone. I knew of her existence but by then it was too late.

youdao