英语语法分析

Susan :You could say "au gratin" when you were 3?

你3岁的时候就可以说“芝士焗”了？

Research on the reflection properties of fiber Bragg gratin .

光纤布喇格光栅的反射特性研究。

I'm afraid the gratin will take about 15 minutes to prepare, Sir.

先生，那道菜恐怕要花十五分钟来准备。