真是让人失望。用英语怎么说 ? 

真是让人失望。的英语翻译是:

That's rather disappointing.

句子单词讲解

1. rather
单词释义: adv.稍微,有点;相当,颇;宁愿;相反地int.当然啦,怎么不
应用场景: CET4|TEM4|考 研|CET6
相关短语:
那事使我颇感惊讶。
It rather surprised me.
这房子挺旧的,得刷一下才行。
This is a rather old house. It needs painting.
我情愿睡觉也不看这部电影。
I would rather sleep than watch this movie.

2. disappointing
单词释义: adj.令人失望的;令人扫兴的v.令人失望(disappoint的ing形式);辜负…的期望
应用场景: CET4|TEM4