新的“永久邮票”，是美国邮政服务(usps)回答有关频繁加息的投诉。

The new "forever stamp" is the United States Postal Service's (USPS) answer to the complaints about frequent rate increases.

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虽然很难辨别哪些包裹里装的是社会保障支票等重要物品，但美国邮政（USPS）和联合包裹服务公司（UPS）会尽其所能优先处理敏感材料。

It can be hard to identify which parcels are carrying crucial items such as Social Security checks, but USPS and UPS try their best to prioritize sensitive material.

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即使是没有邮票的信件也能通过，这对美国邮政服务来说是个罕见的例外。

Even stampless letters get through, a rare exception for the US Postal Service.

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