So a rapid drop of molecular weight should be observed at the small dose.This is demonstrated by the result of [17] of irradiated polymethylene terephthalates.是什么意思_So a rapid drop of molecular weight should be observed at the small dose.This is demonstrated by the result of [17] of irradiated polymethylene terephthalates.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句