He became a fierce critic of the tobacco industry...是什么意思？

He became a fierce critic of the tobacco industry...

他成了烟草业的强烈反对者。

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。

became

v. 变为，成为（ become的过去式 ）；

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。

fierce

adj. 凶猛的，残忍的，猛烈的，狂热的；

例句
There were fierce attacks on the BBC for alleged political bias.
英国广播公司因被指具有政治偏见而遭到猛烈抨击。

critic

n. 批评家，评论员，批评者，挑剔的人；

例句
Mather was film critic on the Daily Telegraph for many years...
马瑟多年来一直担任《每日电讯报》的影评人。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

tobacco

n. 烟草，烟叶，烟草制品，卷烟，纸烟；

例句
Two leading law firms are to prepare legal actions against tobacco companies.
两家很有名的律师事务所准备向烟草公司提起诉讼。

industry

n. 工业，产业（经济词汇），工业界，勤劳；

例句
...the importance of strong links between industry and academia.
工业界和学术界间紧密联系的重要性