The average charge per item, worked out by dividing the total postage payable by the number of items in the posting, is subject to the minimum rates below.

每件邮件平均邮费受以下最低收费限制，每件邮件平均邮费的计算方法是为邮费除以邮件总数。

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Joseph Morales Serrano was taken into custody at his home in San Juan on a charge of cyberbullying for allegedly posting the threatening message on May 6, according to Special Agent Moises Quinones, a spokesman for the FBI in the U.S. island territory.

WSJ: Arrest for anti-gay Twitter threat in Puerto Rico