如何表達-我對你很失望？
1. let-down 失望
例如：
Your rude behavior was a bit of let-down!
你的粗魯的行為真有點讓人失望！
2. disappoint 使某人失望
例如：
Customers were disappointed by the terrible quality of ABC smartphone.
消費者對ABC手機的糟糕質量感到非常失望！
3. disenchant 令某人失望
例如：
Many Chinese became disenchanted with the bilateral relationship of China and South Korea.
不少中國人對中韓雙邊關係感到失望。
4. disillusion 失望，幻滅，使信念破滅
例如：
Mary was hurting badly, never try to hurt her feelings again, and disillusion her! Ok?
瑪麗非常傷心，請不要再傷害她的感情，並讓她失望，好嗎？
5. crestfallen 失望的，沮喪的，垂頭喪氣的
例如：
After being scolded by his line manager, Michael returned to the office crestfallen.
被直線經理斥責以後，邁克垂頭喪氣的回到了辦公室。
6. lose hope 失望
例如：
English learning is a long and tough journey, never lose hope by those small mistakes!
英文學習是一段漫長且艱難的旅程，千萬不要因為小錯誤而失望！
7. despair 絕望，失去希望，喪失信心
例如：
Zhang Yang, a former general of PLA, was driven to despair, he hanged himself at home after being investigated by the CPC Central Military Commission.
前JFJ上將張陽，在被中央軍委調查之後陷入絕望，在其家中自縊身亡。