To my great disappointment, I found I did not have the key with me. I had left it at home without my knowing it.

令我大失所望的是：我发现自己没带钥匙，不知不觉地把钥匙丢在了家里了。

youdao

To our great disappointment, some students still can not go without snacks, littering wrapping papers and plastic bags here and there.

让我们非常失望的是，一些同学仍然不能离开零食，把包装纸和塑料袋到处乱扔。

youdao

Figure out how to share your gifts without expectation or disappointment.

弄清楚如何才能既不期望也不失望地分享你的才能。

youdao

On a personal note, I was delighted to get back in a Great Britain shirt, but it goes without saying that the disappointment of the defeat cancels that out.

BBC: Kevin Sinfield kicked all four of his conversion attempts

"At this stage then it becomes acutely difficult, if not quite impossible, to set a budget and precept which is acceptable without causing a severe level of disappointment within the police service, difficulties amongst our partners and anger from the public that we exist to serve, " Mr Michael said.

BBC: Alun Michael

Right now, the Yankees have enough problems without worrying about avenging last year's disappointment, but playing the Tigers will be an early challenge.

WSJ: ALCS rematch on tap for Tigers' home opener