Abstract The absolute neutron fluence can be determined by the 238U(n,f) cross-section and the number of the fission fragments.是什么意思_Abstract The absolute neutron fluence can be determined by the 238U(n,f) cross-section and the number of the fission fragments.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句