When we send a letter or a postcard, we have to put stamps on the envelope or on the card.

当我们发送信件或明信片，我们要放在信封或卡上的邮票。

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Stamps When we send a letter or a postcard, we have to put stamps on the envelope or on the card.

邮票当我们寄信或寄贺卡时，我们必须在信封或贺卡上贴邮票。

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Stamps When we send a letter or a postcard, we have to put stamps on the envelope or on the card.

邮票当我们寄信或寄贺卡时，我们必须在信封或贺卡上贴邮票。

youdao