正確的應該是to one's disappointment。中文意思是“令某人失望的是”

例如，李平在高中讀書的時候各門功課都非常突出，可令同學和老師們失望的是，在今年高考中表現不盡人意。

For example, when Li Ping was studying in high school, all his subjects were very prominent, but to the disappointment of his classmates and teachers, he didn't perform well in the college entrance examination this year.

One last thing: while people are delighted to be included (and seemto enjoy excluding others), the benefits they feel are dwarfed by theanger and disappointment of those excluded.

最後一件事：當人們對自己被接納感到高興（且看上去對把別人排除在外感到很愉悅）的時候，他們所感受到的好處會被局外人的不滿和失望矮化

One would think that grief and disappointment with God would lead to bitterness against him.

一個人認為，悲傷與對上帝的失望將再次導致對他的痛苦。

As is vividly depicts in the cartoon, old parents are sitting on the coach with disappointment and sadness, because no one comes back to celebrate with them.

漫畫中生動地展示了一對老人帶著失望與悲傷坐在椅子上，因為沒人回來和他們一起慶祝節日。

Opportunities have multiplied, but each one brings pressure to take part and not lose out, and every acquisition seems to come ready-wrapped in disappointment that it isn't something newer and better.

雖然機遇成倍增長，但伴隨每一個機遇而來的還有成敗得失所帶來的壓力，而且每一次的收穫似乎都夾帶著失望，毫無新意並且更為糟糕。

The one thing his star-map certainly did not predict, was that he might ultimately wind up at the British Museum; let's face it, Bloomsbury might have been a bit of a disappointment to him!

有一點他的星相圖當然沒能預測到的是，他最終居然被安置到大英博物館來；我們坦率點說吧，布盧姆斯伯裡這裡對於他而言也難免一種失望！

But this analogy is a facile one, and may well yield disappointment in the months and years to come.

但是這種類比過於簡單，可能會在將來的日子裡遭遇挫折。