HSK V7-9
Correct

落差

/ luòchā / 
Strokes

Definition

drop in elevation/(fig.) gap (in wages, expectations etc)/disparity

Example

As a Noun
drop in elevation; head drop (in hydroelectric power plants)
1
50
50
mǐ
米
de
的
chuízhí
垂直
luòchā
落差

a verticle drop of fifty metres

2
Pùbù
瀑布
de
的
luòchā
落差

drop of waterfalls

As a Noun
gap; disparity; discrepancy