You would have to be pretty hard-hearted not to feel something for him.

你必须是非常铁石心肠才能对他没有一点同情。

《柯林斯英汉双解大词典》

"You must try hard," replied the kind-hearted boy.

“你必须努力尝试，”善良的男孩回答说。

youdao

The quite demeanor of the Capricorn is easily misinterpreted as cold and hard hearted.

摩羯的这种表现很容易让人误解为冷漠和硬心肠。

youdao

I've been broken-hearted and broken some hearts, I've tried running hard from my pain.

NPR: Judy Collins, From Both Sides Now

Under the guidance of charismatic coach Jurgen Klopp, whose popularity has seen a pop song written about him, Dortmund's run to the final has left even the most hard-hearted of seasoned aficionados willing on the men in yellow and black.

CNN: Wieners to Wunderbar: How Germany became uber-cool

You can't accuse those who ordered us to drop blankets of being hard-hearted!

NPR: 'Battle for Peace' in Iraq Echoes Vietnam