He didn't want to say good-bye to his friends.

他不想对他的朋友们说再见。

It's always hard to say good-bye to loved ones.

对亲人说再见总是很难。

The children hold their books close as they say good-bye and run home cheerfully.

孩子们抱着书说再见，高高兴兴地跑回家。

I really must say good-bye.

真的要说再见了。

It's time to say good-bye .

到说再见的时间了。

Itss time to say good-bye.

大家再见，大家再见。

Now I will just say good-bye

我只想说声永别

Shall we say good-bye here?

我们就此告别吧？

Say good-bye to your teacher.

跟老师说再见。

D to say good-bye to you all.

我要向您们大家告别了。