They would be forever bonded.

他们将永远互相束缚。

In short, I sincerely hope that, with our joint effort, we would be forever friend.

总之，我诚心的希望通过我们共同的努力，我们会成为永远的好朋友，你意下如何呢？ （你愿意吗？）

I tried not to intrude on his privacy, but he welcomed me in by asking, Did you ever say goodbye to someone knowing it would be forever?

我不想打扰他的隐私，但他却主动跟我打招呼道，“你是否曾跟一个可能永不相见的人说过再见?。