In any given field, the leading voices come from people who are motivated not by conviction but by the desire to present opinions and ideas that differ from those held by the majority.

在任何领域当中，领导作用总是来自于这些人，他们并不为传统的观念所动，而是极力渴望表达那些和主流思想不同的观点和想法。

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She was motivated by deep religious conviction.

她的行动是出于虔诚的宗教信仰。

《牛津词典》

His conviction was later quashed by the Court of Appeal.

后来，上诉法院撤销了对他的有罪判决。

《牛津词典》

The men were set free,Wednesday, to a tumultuous welcome by their supporters,following a decision by Belgian judge Daniel Fransen, who argued that they were, before any conviction, "presumed to be innocent."

VOA: standard.2009.04.30

But the fourth may count for most: that he is an oilman by conviction as well as profession.

ECONOMIST: Schumpeter

There is marriage of convenience, or maybe by conviction.

CENTERFORSECURITYPOLICY: Adel Guindy: Islamism & the Facade of Egyptian Democracy

But Mr Blair was a centrist by conviction.

ECONOMIST: The Conservatives and Tony Blair