这是我在最幸福的一个晚上听到的。但那时我并不知道自己有多幸福。

I heard it on my happiest evening; but I did not then know how happy I was.

youdao

我怀疑该领域的一些专家会热衷于寻找其他解释，比如未评估的变量在幸福感下降中发挥的作用。

I suspect that some experts in the field will be keen to address alternative explanations, such as unassessed variables playing a role in the wellbeing decline.

youdao

当我转身时，看到爷爷脸上带着几滴幸福的泪水对我说谢谢，那一刻关于爷爷奶奶的许多难忘的回忆在我的脑海里闪过，让我很想哭。

When I turned to look at the grandpa who said thanks to me with a few drops of happy tears on his face, many unforgettable memories of my grandparents flashed in my mind, making me feel like crying.

youdao