jacket [ˈdʒækɪt] n. 夹克
a piece of clothing worn on the top half of the body over a shirt, etc. that has sleeves and fastens down the front; a short, light coat
jacket的特点：
- 一件衣服（a piece of clothing）
- 穿在身体上半部分（ worn on the top half of the body）
- 包含手指和拇指（over a shirt, etc）
- 它有袖子，前面有扣子（that has sleeves and fastens down the front）
- 一个短的、轻的外套（ a short, light coat）
