MEANING/意义
不明
EXAMPLES/列句
-
不明飞行物
unidentified flying object -
我听不明白
I listened but couldn't understand...; I couldn't understand... (by listening) 
COMBINATIONS/组合
-
不明白
do not understand -
不明智
unwise -
不明觉厉
but it seems you are awesome; (popular term on the Internet)  I don't quite get it -
不明不白
shady; obscure; dubious -
界限不明
the boundary is unclear; to have an unclear boundary -
来历不明
be of unknown origin -
下落不明
unaccounted; one's present whereabouts is unknown