Garland covered his mouth with his hand and belched discreetly.

加兰用手捂住嘴，小心翼翼地打了个嗝。

《柯林斯英汉双解大词典》

'Oh dear!' she cried, clapping a hand over her mouth.

“哎呀！”她叫道，突然用手捂住了嘴。

《牛津词典》

I clapped a hand over her mouth.

我猛地用一只手捂住了她的嘴。

《柯林斯英汉双解大词典》

This rich person is the opposite of a person who lives from hand to mouth.

VOA: special.2010.06.20

Everett quickly put his hand over his father's mouth.

VOA: special.2009.03.07

Some even live from hand to mouth.

VOA: special.2009.10.18

Norovirus spreads easily via contaminated food or drinking water, but a more insidious route is from a person touching a surface contaminated with the residue of stool or vomit from an infected person and then touching his or her mouth before hand-washing.

FORBES: Magazine Article

In some of the photos, the accused had his arm around the children or was covering their mouth with his hand.

BBC: LA teacher held for gagging and blindfolding children

Kerry listened intently, covering his mouth with his hand.

NEWYORKER: The Force