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　これ、速達で送らなきゃ。
I need to send this by express mail.

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　これを送るには、切手はどのくらい必要かしら。…?
I wonder how many stamps I'll need to send this?

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　どうし戻ってきちゃったのかしら？　あっ！ 切手貼るの忘れてたんだ。
I wonder why this ^came back [got returned]?　Oops! I had forgotten to put a stamp on it.

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　大変だー！　これ出すの忘れた！　ルーシー、これポストに入れてきてくれる？
Oh, no!　I forgot to mail this!　Lucy, can you go put this in the mailbox?

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