If heavy atoms could be split, scientists reasoned, this energy could be released, as it is when the radioactive elements disintegrate spontaneously.是什么意思_If heavy atoms could be split, scientists reasoned, this energy could be released, as it is when the radioactive elements disintegrate spontaneously.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句