satch·el /ˈsæʧəl/
書包,小背包
Satch·el n. A little sack or bag for carrying papers, books, or small articles of wearing apparel; a hand bag. [Spelled also sachel.]
The whining schoolboy with his satchel. --Shak.
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satchel
n : luggage consisting of a small case with a flat bottom and
(usually) a shoulder strap