Normally, such an outward display of affection is reserved for his mother.

通常，他只在他母亲前才情感外露。

《柯林斯英汉双解大词典》

There was no fatherly affection, no display of sentiment.

没有像父爱般的亲昵，没有显得过于激动。

《牛津词典》

Public Display of Affection is so common and varied that it's earned its own acronym, the PDA.

公共场合亲密行为很常见，也很多样化。 它已经拥有了自己的首字母缩略词--PDA。

youdao

The display of affection comes less than a week after the pair shared a carriage at Trooping the Colour.

BBC: NEWS | UK | Prince's prize kiss for Duchess

However, she was suspended from school for "disrespectful conduct" and "public display of affection, " her lawyers wrote in the lawsuit.

FORBES: Middle School Girl Expelled, Forced to Apologize to Boy Who Raped Her

Here's the dice: In order to win the Solar Backpack we want to see a little public display of affection for Engadget, and we want you to get creative about it.

ENGADGET: Day 1 of Engadget's Five Days of Holiday Giveaways: Win Voltaic's Solar Backpack