adv.忠实地，诚心诚意地，如实地
They swore an oath to carry out their duties faithfully.
他们宣誓忠实履行自己的职责.
He has served the farm faithfully for 20 years.
他为这个农场忠心耿耿地操劳了20年.
to follow instructions faithfully
严格遵循指示
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