A person who is willing to serve others selflessly and diligently, often sacrificing personal gain for the common good; a devoted and hardworking individual.
这位科学家一生致力于研究，甘当科学界的孺子牛，为人类的进步贡献了毕生精力
This scientist dedicated his entire life to research, willingly acting as a 'youngster's ox' in the scientific community, contributing his life's efforts to human progress.
Era:
Modern
Frequency:
Story:
During the Spring and Autumn period, Duke Jing of Qi, in his leisure time, wanted to amuse his young son, Tu.
He bit a rope and pretended to be an ox for Tu to lead.
Tu was delighted, singing and dancing with such excitement that he lost his balance and fell.
Duke Jing, having bitten the rope too tightly, unexpectedly had several of his teeth pulled out in the process.
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