耿耿于怀
[词典] take sth. to heart; an uneasy heart; an unsettled or disturbed mind; brood on (an injury, one's neglected duty, etc.);
[例句]同志之间有些小矛盾，过去就算了，不要老是耿耿于怀。
Forget about trivial disagreements among comrades, and don't take them to heart.
耿耿于怀
[词典] take sth. to heart; an uneasy heart; an unsettled or disturbed mind; brood on (an injury, one's neglected duty, etc.);
[例句]同志之间有些小矛盾，过去就算了，不要老是耿耿于怀。
Forget about trivial disagreements among comrades, and don't take them to heart.