Something that is promising shows signs that it is going to be successful or enjoyable.

They won the award for the most promising new band of the year. 他们赢得了该年度最有前途新乐队奖。

"How's your new venture going?" "It's looking quite promising." “你的新事业进展得如何？”“看上去相当不错。”

It's a great restaurant but it doesn't look at all promising from the outside. 这间餐厅棒极了，不过从外面看可一点都看不出来。