Shenron can't revive someone a second time...

This means that...

W-What!?

I have granted your wish.

Farewell!

Not only will Gohan and Chiaotzu stay dead ...

Most of us won't be brought back if we die in this battle.

It is exactly as you said master Roshi... We have reached the limits of the dragon balls. In this battle we will risk everything for everything.

Shenron can't revive someone more than once...

W-What!?

How is this possible!? Why didn't anyone tell us before!?

... then I will also stay here...

If Chiaotzu can't be brought back...