No matter how hard I try I cannot seem to catch up on all the bills.

不管我怎么努力，我好像总也无法付清所有的账单。

《柯林斯英汉双解大词典》

I'm humbled by my experience, and regardless of how hard I try, my images pale in comparison to the canyon's majesty.

我的经验使我感到卑微，无论我多么努力尝试，与大峡谷的威严相比，我的想象是苍白的。

youdao

As a mother I can do a lot of things for my children, but no matter how hard I try I can never be their father.

作为一个母亲，我可以为我的孩子们做许多事情，但是不管我怎样努力——我永远成为不了他们的父亲。

youdao

Yet, no matter how hard I try, I just can't give my videos to WMV.

ENGADGET: The Clicker: Dear Microsoft, "help me help you."

"The lawn needs to be watered, the cat box is stinky, there are dirty socks in the living room, silverware in the grass out back, and I can't get those children to get to bed at 7:30 no matter how hard I try, " he says.

WSJ: When the Wife Is the Breadwinner