常見例句雙語例句In the oil and gas wells in Sichuan Basin, the percentage of naphthenic hydrocarbon gradually decreased while the normal alkane and isoalkane increased from deep to surface.四川盆地油氣井中自深至淺，環(huán)烷烴百分組成逐漸降低，正搆和異搆烷烴不斷增加； 返回 naphthenic hydrocarbon