Yabla video uses of

de
什么 shénme
古代 gǔdài
yǒu
de
tóng
a
de
a
de
什么的 shénmede
Plate with what? In the past, there were copper plating, tin plating, other types of plating.
这个 zhège
就是说 jiùshìshuō
我们 wǒmen
jiào
jiào
镏金 liújīn
gěi
dāo
shàng
一层 yīcéng
什么 shénme
东西 dōngxi
This is what we call... plating gold, using a knife to plate a layer of something.