tā / yì fān / guān miǎn táng huáng / de / lǐ yóu / yǎn gài / le / zì jǐ / bù kěn / chéng dān / zé rèn / de / shì shí

他用一番冠冕堂皇的理由，掩盖了自己不肯承担责任的事实。

He used a series of high-sounding reasons to conceal the fact that he was unwilling to take responsibility.