請將下面這段話翻譯成英文：

　　三無科學(xué)家

　　“三無科學(xué)家”是指在沒有博士學(xué)位、無留洋背景和無院士頭銜的時候，就在研究領(lǐng)域獲得了舉世矚目的成果的科學(xué)家。例如，獲得諾貝爾獎的屠呦呦、“雜交水稻之父”袁隆平，和河北科技大學(xué)副教授韓春雨等。

　　參考譯文

　　Scientists of “Three Had-nots”

　　Scientists of "three had-nots" are scientists who had no doctorate degrees, no overseas studying experiences, or the fellowship of national science academies and who nevertheless make world-famous breakthroughs in their research. Tu Youyou, the doctor who won the Nobel Prize and Yuan Longping, the “Father of Hybrid Rice” are among those scientists of “three had-nots”.

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