我的祖父是一名二战期间的美国大兵。

My grandfather was a ___G.I. during World War II.

他喜欢收集军用装备，尤其是一些G.I.风格的物品。

He enjoys collecting military gear, especially items with a ___G.I. style.

陆军士兵们都穿着G.I.军靴。

The army soldiers all wore ___G.I. boots.