In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
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Question: Wave particle duality is the concept in quantum mechanics that every particle or quantum entity may be partly described in terms not only of particles , but also of waves .

Answer: Wave particle duality means that all particles show both wave and particle properties .

Question: The High Priest and Priestess act as administrative chiefs and primary public representatives ; each position ( High Priest and High Priestess ) is held by a single individual at a time .

Answer: The High Priest and Priestess act as administrative chiefs and the two main public representatives .

Question: An emergency communication system ( ECS ) is any system ( typically computer-based ) that is organized for the primary purpose of supporting one-way and two-way communication of emergency information between both individuals and groups of individuals .

Answer:
An Emergency communication system ( ECS ) is any type of system ( often using computers ) that lets people or groups communicate during emergencies .