ethynyl

例句：

1. 1. Ethynylene is a chemical compound that is used in the production of plastics.
   乙炔是一种用于生产塑料的化学化合物。
2. 2. The reaction between ethynyl and oxygen produces carbon dioxide gas.
   乙炔与氧气的反应产生二氧化碳气体。
3. 3. Ethynylene can also be used as a solvent for various organic compounds.
   乙炔还可以用作各种有机化合物的溶剂。