表面上

tā zhǐ yǔ tā de tóng shì men jìn xíng biǎo miàn shang de hù dòng

他只与他的同事们进行表面上的互动。

He interacted only superficially with his co-workers.

biǎo miàn shang tā lí zhí de lǐ yóu shì shēn tǐ qiàn jiā

表面上他离职的理由是身体欠佳。

The ostensible reason for his resignation was ill health.