He certainly was not politically inactive...是什么意思？

He certainly was not politically inactive...

他政治上当然不是无所作为。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

certainly

adv. 无疑，当然，确定，肯定；

例句
The Party was certainly not an official adjunct of the police department.
该党派肯定不是公安部门的官方附属机构。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

politically

adv. 政治地，政党地；

例句
...the politically sensitive area of old age pensions.
有关养老金的政治敏感话题

inactive

adj. 不活动的，不活跃的，懒散的，怠惰的，闲置的，[化]钝性的；

例句
The satellite had been inactive since its launch two years ago.
该卫星自从两年前发射以来一直没起作用。