一层

jiē shang de yī céng bīng

街上的一层冰

a layer of ice on the street

báo báo yī céng tǔ

薄薄一层土

a thin layer of clay

zài shēng cài yè shang pū yī céng xī hóng shì

在生菜叶上铺一层西红柿

tomatoes on a bed of lettuce

xiān pū yī céng suì shēng cài yè zài bǎ yú fàng shang

先铺一层碎生菜叶，再把鱼放上。

First lay a layer of chopped lettuce leaves, and then put the fish on.