buy envelopes
买信封
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Where can I buy envelopes and writing paper?
哪儿可以买到信封和信纸？
youdao
By the way where can I buy envelopes and letter paper?
顺便问一下，哪儿能买到信封和信纸？
They could go to a nearby post office to buy stamps and put them on the envelopes before they sent letters.
在发信之前他们可以去附近的邮局买邮票，贴在信封上。
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