名詞 ethylene:

1. a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
   同義詞：ethene

1. A substance, often a liquid such as ethylene glycol or alcohol, mixed with another liquid to lower its freezing point.
   防凍劑，防凍液，抗凝劑一種物質(zhì)，通常是液體，如乙二醇或酒精，和另一種液體混合來降低冰點

eth.yl.ene

n.（名詞）
A colorless, flammable gas, C2H 4, derived from natural gas and petroleum and used as a source of many organic compounds, in welding and cutting metals, to color citrus fruits, and as an anesthetic. Also called ethene
乙烯：一種無色易燃氣體，C2H 4，可從天然氣和石油中獲得，用作許多有機化合物的來源，用于焊接和切割金屬，柑桔屬水果的著色，以及用作麻醉劑 也作 ethene

【引伸】
eth.yle.nic