Where the rate of content weight of uranium and thorium in nuclear source material is higher than five-ten thousandths, and the total weight of uranium and thorium does not exceed one kilogram.是什么意思_Where the rate of content weight of uranium and thorium in nuclear source material is higher than five-ten thousandths, and the total weight of uranium and thorium does not exceed one kilogram.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句