The main function of pr communication is to build brand image of travel destination and to hold together inside and outside connections of it.

公关传播的主要作用在于树立景区品牌形象以及维系景区内外关系。

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PR crisis is an event triggered by a certain unexpected factor from inside and outside the organization.

公共关系危机是由组织内外的某种突发性因素所引发的公共关系市场事态。

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Photorefractive (PR) spatial solitons form when the self-focusing of a light beam inside the PR material exactly balances the diffraction of the beam.

光折变空间光孤子是指当光折变材料的自聚焦效应与光束的衍射发散作用相平衡时，在介质内无衍射向前传播的光束。

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The initiative to take journalists inside the trial site is part of a major PR offensive by the scientists and their backers to be open and transparent about the research - in an effort to explain its value to the public.

BBC: Fortress security for GM wheat trial