naphthenic

例句：

1. 1.The naphthalene was used to make dyes and solvents.
   萘被用来制造染料和溶剂。
2. 2. The naphthalene is a valuable chemical.
   萘是一种有价值的化学物质。
3. 3. The naphthalene can be extracted from petroleum.
   萘可以从石油中提取出来。