He believed in marital fidelity.

他赞成对婚姻忠实。

《柯林斯英汉双解大词典》

He also believed in coexistence with the West.

他也赞成与西方共存。

《柯林斯英汉双解大词典》

I've always believed in living life to the full.

我总是相信生活要尽量充实。

《牛津词典》

Since ancient times, thinkers including the Greek astronomer Ptolemy believed in the existence of a huge continent on the South Pole.

VOA: special.2009.06.03

So, I started off with Piaget, and Piaget, like Freud, believed in general, across the board changes in how children think.

我先来说说皮亚杰,和弗洛伊德一样,皮亚杰相信,总体上看,儿童的思维方式会发生全面的改变

耶鲁公开课 - 心理学导论课程节选

He believed in a strong central state, which was a real departure for him from the rest of the pro-slavery writers.

他坚信有个强大的中央政府,在亲奴主义作家中,他的理论着实是个大飞跃

耶鲁公开课 - 美国内战与重建课程节选

According to Isaacson, Jobs said he was "50-50" on whether he believed in God.

CNN: How to live, and die, like Steve Jobs

Her son said his mother felt let down by a system she had once believed in.

BBC: Fermanagh woman 'abandoned' by health service

Pat Brown was a committed progressive who actually believed in both social and economic progress.

FORBES: California's Third Brown Era