岩石在风化过程中被分解成越来越小的颗粒。
The rocks get broken down into smaller and smaller particles as they are weathered.
它们可能会分解成更小的塑料颗粒，在环境中广泛传播。
They may break into smaller plastic particles that spread widely in the environment.
云的催化是指将催化剂颗粒打入云中使云中的水蒸汽凝聚成水滴，从而实现降雨的技术，催化剂颗粒通常为碘化银。
Cloud-seeding is a technique to enhance rainfall by introducing particles - often silver iodide crystals - into cloud systems, to help condense water vapor into raindrops.
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