He was a despot with a heart of granite. 他是个铁石心肠的暴君。
Mrs. Macbeth has a heart as hard as flint. 麦克白夫人生来一副铁石心肠。
She has no feeling for the suffering of others. 她对别人的痛苦没有同情心。
I forgive those ancestors who had no compassion and therefore failed to aid others in need at the time that they lived. 我原谅那些没有同情心,从而未能在他们在世的时代帮助需要帮助的其他人的祖先。