In the early 1980s, Duffner conducted some of the first studies on the effects of radiation on the brains of children with brain tumors.是什么意思_In the early 1980s, Duffner conducted some of the first studies on the effects of radiation on the brains of children with brain tumors.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句