5PHRASE 痛处;惹人生气的话题;令人难堪的话题 If something is a sore point with someone, it is likely to make them angry or embarrassed if you try to discuss it. 痛处;惹人生气的话题;令人难堪的话题
The continuing presence of American troops on Korean soil remains a very sore point with these students. [+ with/for/between]