我向祖父道别，不知道我再也见不到他了。

I said good bye to grandfather, not knowing I would never see him again.

youdao

那么您如何有风度地、得体地向您的同事道别呢？

So, how do you say goodbye with grace and tact?

youdao

我仅仅是要关掉一个计算机服务器，而不是舍弃一个生命或者向即将逝去的忠诚宠物道别。

It was only a computer server I was shutting down, not pulling the plug on a life or saying goodbye to faithful pet.

youdao