烷基

例句：

1. 1. The molecule containsan alkyl group at the endof its carbon chain.
   这个分子在其碳链的末端有一个烷基。
2. 2. Alkyl groups are commonly found in petroleum and other hydrocarbons.
   烷基通常在石油和其他烃类中发现。
3. 3. Thereaction mechanism involves the formation of alkyl radicals through a series of chemicalreactions.
   该反应机制涉及通过一系列化学反应形成烷基自由基。