鞠躬尽瘁死而后已的英文：
[Literal Meaning]
bend/exhaust/pain, die/aux./after/stop
to be bent on work and exert oneself to the utmost, never stop until one dies

[解释]
勤勤恳恳，竭尽心力，到死为止。

[Explanation]
to spare no effort in the performance of one's duty

[例子]
周总理鞠躬尽瘁，死而后已，把一生都献给了国家和人民。

[Example]
Premier Zhou spare no effort in the performance of his duty and devoted all his life to his country and people.