我不知道为什么尼克到现在还是单身。今年他已经35岁了。

I don't know why Nick still remains single. He is 35 years old this year.

youdao

而我第一眼看到他我就爱上他了，不知道为什么会有这样的感觉——在看到他的那一刹那，我就觉得我的心已经不属于我自己了。

But for me, I love him at the first sight. I never get it why I should have had that kind of feeling — the moment when I saw him, I felt like my heart had not belonged to myself any more.

youdao

汤姆已经回家了，但是我不知道为什么（他回家）。

Tom has gone home, but I don't know why (he has gone home).

youdao