词汇	gas residual
释义	gas residual 残留气；残余气
随便看	double-swivelling recoiler double swivel nozzle double swords double Sylisble double syllabic words double syllable double-syllable compound word double-syllable ending Double Syllable Verb double-syllable word double-symmetry double synchronous double synchronous event double syndactyly double system double systematization double-system double-wavelength fluorometry double-system electricity price double system of ignition double-system receiver double system recording double systems double system sound recorder double system sound recording double-system sound recording