Correct
平缓
/ pínghuǎn /
Strokes
Definition
level/almost flat/not strongly sloping/fig. moderate/mild-mannered/gentle
Example
As an Adjective
(of terrain, water flow, etc) even; gentle; smooth
1
Shuǐliú
水流
pínghuǎn
平缓
。
The currents flow gently.
2
Shānpō
山坡
pínghuǎn
平缓
gentle slope
3
Dìshì
地势
pínghuǎn
平缓
smooth terrain
As an Adjective
(of mood, voice, etc) mild; gentle
4
Yǔdiào
语调
pínghuǎn
平缓
be mild in tone