"This is goodbye, isn't it?" she said quietly.

“这就算告别了，不是吗？”她轻声地说道。

《柯林斯英汉双解大词典》

Does that mean it is goodbye to the new paper, and the smell of the black ink?

这是不是以后就不需要纸质课本了，闻不到墨水味了呢？

youdao

'So this is goodbye,' she said ruefully.

她悲伤地说：“那么，这就是告别了。”

《牛津词典》

'So this is goodbye,' she said ruefully.

她悲伤地说：“那么，这就是告别了。”

《牛津词典》