polyyne

例句：

1. 1.Polyynes are a type of organic compound with unique properties.
   多炔是一种具有独特性质的有机化合物。
2. 2. The discovery of polyynes has revolutionized the field of chemistry.
   多炔的发现已经彻底改变了化学领域。
3. 3. Polyynes have been used in various applications such as lubricants and plasticizers.
   多炔被用于各种应用，如润滑剂和增塑剂。