热热热久久久免费视频|第四色五月婷婷五月天AV|日韩高清无码免费一级大片|日本成人手机在线视频|中文字幕无码Av在线|台湾a级别黄片免费看|欧美一级性爱亚洲第一性爱|A级黄色电影久草大|www.91精品视频|亚洲AV资源欧洲无码在线观

單詞乎

heptane

音標['heptein]
heptane是什么意思、heptane怎么讀

heptane漢語翻譯

【化】 庚烷
【醫(yī)】 庚烷

heptane英語解釋

名詞 heptane:

  1. a colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings

heptane詳細解釋

hep.tane

n.(名詞)
A volatile, colorless, highly flammable liquid hydrocarbon, C7H ', obtained in the fractional distillation of petroleum and used as a standard in determining octane ratings, as an anesthetic, and as a solvent.
庚烷:一種易揮發(fā)、無色、非常易燃燒的液狀碳氫化合物,C7H ',由石油的分級蒸餾而來,用作辛烷分級的標準,亦可作麻醉劑和溶劑

0
糾錯