3 sentences

1. 他的面部表情非常严肃。

   tā de miàn​bù biǎo​qíng fēi​cháng yán​sù.

   His facial expression was very serious.

   Source: Dong Chinese Dictionary

2. 她在那家很有名的医院做了面部整形。

   tā zài nà jiā hěn yǒu​míng de yī​yuàn zuò le miàn​bù zhěng​xíng.

   She had facial cosmetic surgery at that well-known hospital.

   Source: Dong Chinese Dictionary

3. 这种新技术可以更准确地辨识人的面部特征。

   zhè zhǒng xīn jì​shù kě​yǐ gèng zhǔn​què de biàn​shí rén de miàn​bù tè​zhēng.

   This new technology can more accurately identify human facial features.

   Source: Dong Chinese Dictionary