Title: Необов'язково

Text: How can we know anything about particles we cannot detect? To understand how we deduce properties of resonance particles, it is first necessary to examine another, more complicated, explanation of their existence. This explanation involves the scattering cross-section of a particle. When two particles move towards each other and collide, it is possible to say that the collision was caused by the cross-section of the particles. Кожен абзац буде тестом.

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