ketene

例句：

1. 1.Ketene is a colorless liquid that can be used as a solvent.
   二甲醚是一种无色液体，可以用作溶剂。
2. 2.Ketene is a compound with properties similar to those of methane.
   二甲醚是一种具有甲烷类似性质的化合物。
3. 3.Ketene is used in the production of synthetic rubber and plastics.
   二甲醚用于合成橡胶和塑料的生产。