Fluorine and hydrogen fluoride in a mixed gas, HF--F_2--Ar ahd F_2--HF--N_2,have been determined.是什么意思_Fluorine and hydrogen fluoride in a mixed gas, HF--F_2--Ar ahd F_2--HF--N_2,have been determined.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句