He'd almost certainly seen pitta bread used with a filling on his travels in the Eastern Mediterranean.

他在东地中海旅行时，几乎肯定见过皮塔面包和馅料放在一起食用。

He'd almost certainly seen pitta breads used with a filling on his travels in the Eastern Mediterranean.

几乎可以肯定，他在东地中海旅行时见过带馅的皮塔面包。