请教一句话翻译

the fact that a raw material gas composed of a mixed gas in which the molecular oxygen containing gas and possibly the diluent gas have been added to a lower alcohol, is introduced into a fixed bed reactor containing the catalyst.

请教，这句话怎么理解？

(the fact that) a raw material gas composed of a mixed gas in which (here in \"which\" refers to in \"a mixed gas\") the molecular oxygen containing gas and possibly the diluent gas have been added to a lower alcohol, (aforesaid \"a raw material gas\" is the object) is introduced into a fixed bed reactor containing the catalyst.

the fact that a raw material gas composed of a mixed gas in which the molecular oxygen containing gas and possibly the diluent gas have been added to a lower alcohol, is introduced into a fixed bed reactor containing the catalyst.
that后面为the fact的同位语，大意如下：
由混合气体组成的原料气体被引入到含催化剂的固定床反应器，其中混合气体中含氧分子的气体（可能也有稀释气体）已被混合到低度乙醇中。

lower alcohol是低级醇。