If you describe something as unpromising, you think that it is unlikely to be successful or produce anything good in the future.
例句
In fact, his business career had distinctly unpromising beginnings...事實(shí)上，他的經(jīng)商生涯從初期就明顯前景暗淡。Their land looked so unpromising that the colonists eventually gave most of it back.他們的土地看上去日后沒什么用途，所以殖民者最終把大部分都?xì)w還給了他們。
英英詞典釋義
Adjective
1. appearing to be unlikely to result favorably or be enjoyable;
"faced an unpromising task""music for unpromising combinations of instruments"