say goodbye”的中文意思是：说再见，作别。
【双语例句】
（1）He wanted to say goodbye to you
他想跟你说声再见。
（2）I've come to say goodbye to you.
我向你告别来了。
（3）He left in such haste that he had no time to say goodbye to his friends.
他匆促启程，未及向朋友告别。
（4）And for now I say goodbye and goodnight.
和我现在要说再见和晚安。
（5）You say goodbye to me although I say hello to you.
尽管我对你问好，你却对我说再见。
