Some manage it. Some fail miserably.

有人成功了。有些人败得很惨。

'I'll never manage it,' he said hopelessly.

“我永远也搞不定。”他绝望地说。

We ought to be able to manage it between us.

我们齐心协力应该能把这事办妥。

I don't think we'll manage it. Still, we can but try.

我想我们应付不了这事。但不妨试试。

I don't know exactly how we'll manage it , but we will, somehow.

我说不准我们如何去完成这件事，但不管怎样我们一定会完成的。