Correct
低能
/ dīnéng /
Strokes
Definition
incapable/incompetent/stupid/mentally deficient
Example
As an Adjective
mentally retarded/deficient; feeble-minded; imbecile; idiotic
1
Dīnéng
低能
bānjí
班级
class of low intelligence
As an Adjective
low-energy
2
Dīnéng
低能
zhàomíng
照明
shèbèi
设备
low-energy lighting system