If you give him another two cakes ,he will be satisfied.(保持原句意思)

问题描述:

If you give him another two cakes ,he will be satisfied.(保持原句意思)
He won't be satisfied ______you give him two _____cakes.

He won't be satisfied unless you give him two more cakes.
unless在这里表示条件,可以翻译成“如果不”,但最终表示的句意是一样的,只是所涉及的语气不同.
two more cakes就是“另外两块蛋糕”的意思.