Ministry of Education 《Revised Mandarin Chinese Dictionary》

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Word	殫精極思
Bopomofo	`ㄉㄢ` `ㄐㄧㄥ` `ㄐㄧ^ˊ` `ㄙ`
Hanyu pinyin	dān jīng jí sī
Interpretation	竭盡智力與思慮。也作「殫精畢思」。