Correct

两张皮

/ liǎng zhāng pí /
Strokes

Example

Definition

two skins—two related matters or aspects becoming disjointed and uncoordinated

1
yào
不要
科技
jìn
进步
jīng
经济
zhǎn
发展
fēn
分割
kāilái
开来
  
,
liǎng
zhāng
  

Sci-tech progress and economic development should not be separated, as if they were unrelated.