頑固的（形容詞）

(adjective) Stubbornly confident in one's own opinions regardless of the advice or warnings of other; acting like a mule.

EXAMPLE: The mulish young man inherited a large fortune, but he lost all of it quickly by making disastrous business decisions everyone warned him against.

這位頑固的年輕人繼承了一大筆遺產(chǎn)，但由于做了一些所有人都反對的商業(yè)決策，他又很快失去了全部遺產(chǎn)。

to plumb the depths of something

深入

To examine something very carefully in order to understand it thoroughly.

EXAMPLE: The team of young doctors plumbed the depths of medical research in order to find a cure for the mysterious disease.

為找到關(guān)于這種神秘疾病的療法，這支由青年醫(yī)生組成的團隊進行了深入的醫(yī)學(xué)研究。