s. not up to expectations
a. 使失望的, 期待落空的, 令人沮丧的
1. The movie was disappointing because I expected it to be much better.
这部电影令人失望，因为我期待它会更好。
2. It was disappointing to hear that the concert was canceled.
听到音乐会被取消真是令人失望。
3. I found the ending of the book quite disappointing.
我觉得这本书的结局相当令人失望。