wú / lùn / gōng / zuò / duō / me / xīn / kǔ / tā / dōu / rèn / láo / rèn / yuàn / cóng / lái / bù / bào / yuàn

无论工作多么辛苦，他都任劳任怨，从来不抱怨。

No matter how hard the work is, he works without complaint and never grumbles.