1 sentence

1. 他虽然平日里沉默寡言，但关键时刻却表现出了硬骨头精神。

   tā suī​rán píng​rì lǐ chén​mò​guǎ​yán, dàn guān​jiàn shí​kè què biǎo​xiàn chū le yìng gǔ​tou jīng​shén.

   Although he is usually a man of few words, he showed an unyielding spirit at the critical moment.

   Source: Dong Chinese Dictionary