tā / wèi / le / zhè / ge / jiā / xīn / kǔ / gōng / zuò / le / jǐ / shí / nián / gān / yuàn / zuò / niú / zuò / mǎ

他为了这个家辛苦工作了几十年，甘愿做牛做马。

He worked hard for this family for decades and was willing to work tirelessly for them.