Examples
kūn chóng昆虫yǒu有yì céng一层jiān yìng坚硬de的biǎo pí表皮。
昆虫有一层坚硬的表皮。
Insects have a hard skin.
机器蒙上了一层灰。
The machine was coated with dust.
太阳穴钝钝地痛，意识似乎被笼罩上了一层薄薄的雾霭。
I have a dull pain in my temples and my mind feels like its covered with a thin layer of fog.