如何使用 "postmark" 造句

1. So they can 't trace the postmark .
别让他们从邮戳查到你。
2. The postmark was that of a city many miles distant .
邮戳标明寄自另一个遥远的城市。
3. Letter with a london postmark .
带有伦敦邮戳的信。
4. I see from the postmark that this postcard was mailed from new york .
从邮戳上可以看出,这张明信片是从纽约寄来的。
5. Stamp with a postmark to indicate date and time of mailing .
用邮戳标记以表明邮寄的日期和时间。