求最佳翻译：如果过去已经不能改变，那么我们能抓住的只有未来了。

If yesterday cannot be altered,what we can seize is tomorrow.

If the past is unchageable, it is only the future that we can handle.

If we can not change the the past,the only thing can do is handle the future

1/ Let bygones be bygones. Seize the future.

2/ Take in what's gone, take up for what's coming.

if we can't change the past, let's grasp the future