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counter for things inside a bag
買い物の時はエコバッグを袋として使う。
I use an eco-bag as a bag when shopping.
お菓子の袋を開けて皆に分けてあげた。
I opened the bag of sweets and shared them with everyone.
この紙袋は丈夫で何度も使えそうだ。
This paper bag is sturdy and looks like it can be used many times.