她以帮助无家可归者为己任。

Her mission in life was to work with the homeless.

《牛津词典》

有些人想要震惊世人，另一些人想要吸引人们关注科学，或者想更好地奖励那些以科研为己任的人。

Some want to shock, others to draw people into science, or to better reward those who have made their careers in research.

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他可以获得伟大的成就，只有当他的国家以引领全人类的希望为己任，而不以一己之力能否承担为虑。

He can achieve that greatness only as his country serves causes greater than its own power and as large as the hopes of mankind.

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