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Speleology
Speleology (also spelled spelæology or spelaeology) is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is also sometimes applied to the recreational activity of exploring caves, but this is more properly known as caving, spelunking or potholing. Speleology and caving are often connected, as the physical skills required for in situ study are the same. Speleology is a cross-disciplinary field that combines the knowledge of chemistry, biology, geology, physics, meteorology and cartography to develop portraits of caves as complex, evolving systems.
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鏡片顏色
Eyewear; Sunglasses
一般用途最流行的顏色是灰色的顏色保持真實不失真。與綠色像灰色鏡片,顏色將保持真實和紫外和紅外燈吸收好。布朗是特別有效過濾分散藍輕常見的朦朧、 霧或低光條件。棕色或呈琥珀色提高深度知覺和可變光照條件的對比度。 ...