When a principal asks a boy to leave his handbag at home, is the request an attempt to protect a student from harassment or harassment itself?

当一位校长提出要某位男生将他的手袋放回家中，这个要求究竟是在试图保护他免受骚扰，还是，这本身就是一种骚扰？

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The integrated system is deployed on U.S. Navy MH-60R multi-mission helicopters whose principal mission is to protect the fleet from submarines and surface vessels.

该系统部署在美国海军的MH-60R多任务直升机上，其主要任务是保护港口的潜艇和水面舰艇。

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The principal mission of the MH-60R multi-mission helicopter is to protect the fleet from submarines and surface vessels and provide a maritime strike capability.

MH - 60r多任务直升机的主要任务是保护潜艇和水面舰队，并提供海上打击能力。

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Agency lawyer Louis Brown told the hearing that its principal aim was to "protect and enhance the environment" on inland waterways.

BBC: Environment Agency sued over carp-eating otters

"The principal thing we have to do is protect public health, " he said.

BBC: NEWS | UK | Wales | North West Wales | Boil water order lifted for 9,000

"We are just starting to understand the ripple down effects and the repercussions of losing amphibians, " said Jamie Voyles, a biologist at New Mexico Tech in Albuquerque and one of the principal investigators of Project Atelopus, an effort to study and protect frogs of an endangered genus in Panama.

NPR: Alarm Over Vanishing Frogs In The Caribbean