Definition (帽子)
A type of hat characterized by a flat top and a short, often stiff, brim.
帽子（顶部平坦且不高）
The old gentleman was sitting on a park bench, wearing a gray flat cap.
那位老先生坐在公园长椅上，戴着一顶灰色的平顶帽。
He looked like a farmer in his overalls and a tweed flat cap.
他穿着工作服和花呢平顶帽，看起来像个农夫。
She wore a stylish black flat cap that complemented her smart trench coat.
她戴着一顶时尚的黑色平顶帽，搭配她干练的风衣。