Word: 一层 (yīcéng)

地板上打了一层蜡。

Dìbǎn shàng dǎle yìcéng là.

A coat of wax was put on the floor.

早上山谷里弥漫着一层白雾。

Zǎoshang shāngǔ lǐ mímànzhe yìcéng bái wù.

In the morning, a layer of white fog hangs over the valley.

机器蒙上了一层灰。

Jīqì méng shàng le yìcéng huī.

The machine was coated with dust.

杯底有一层白色的糖结晶。

Bēi dǐ yǒu yìcéng báisè de táng jiéjīng.

There is a layer of white sugar crystals at the bottom of the cup.

河底有一层厚厚的淤泥。

Hédǐ yǒu yìcéng hòuhòu de yūní.

There is a thick layer of silt on the riverbed.

电线外面有一层金属屏蔽。

Diànxiàn wàimiàn yǒu yìcéng jīnshǔ píngbì.

There is a layer of metal shielding around the wire.