You would write better if you had a good pen.
要是有枝好笔, 就能写得更好.
The result is not very important to us, but if we do win, (then) so much the better.
输赢对我们并不十分重要, 但假如我们真赢了, （那）就更好了.
It's been done, and, for better or worse, we can't change it now.
事已至此, 无论是好是坏, 已无法改变.
