Correct

低缓

/ dīhuǎn /
Strokes

Definition

low and unhurried (voice etc)/low and gently sloping (terrain)

Example

As an Adjective

(of voice) deep and slow

1
huǎn
de
shēng
歌声
yuèěr
悦耳
dòngtīng
动听
  

His low and unhurried singing is very pleasant to the ear.

As an Adjective

(of terrain) low and sloping gently

2
shì
地势
huǎn

low and gently sloping terrain