boundary protection

• 边界保护

boundary protection的用法和样例：

例句

1. But the postmaster suspected the package contained live organisms and notified authorities, according to the U.S.Customs and Border Protection agency.
   美国海关暨边界保护局表示，该地的邮局局长怀疑包裹内藏有生物并通报相关单位。