tā / suī / rán / jiě / shì / le / hěn / duō / dàn / guī / gēn / jié / dì / hái / shi / bù / yuàn / yì / chéng / rèn / cuò / wù

他虽然解释了很多，但归根结蒂还是不愿意承认错误。

Although he offered many explanations, in the final analysis he was still unwilling to admit his mistake.