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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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橡子

Fruits & vegetables; Fruits

帶肋、 暗綠色皮膚和略甜橘肉的橢圓形冬季壁球。可吃烤或直接從外殼。這個詞壁球來自麻塞諸塞州的印度詞"asquash"意思"吃的綠色"。

林檎果實

Fruits & vegetables; Fruits

也稱為"糖蘋果",這是美國熱帶樹的果肉甜。這個皮膚心形的水果是甜和西葫蘆樣。這是類似的風味溫和的 cherimoya 。吃原料、 ...

蘋果

Fruits & vegetables; Fruits

圓的、 綠的、 甜的水果,至少 3000 年來在世界各地的溫帶地區耕地。

拘留和教養的使用條件

Fire safety; Prevention & protection

在節 20 生命安全要求的應用程式。7,居民使用者類別分為五個使用條件。

雇工

Labor; Labor relations

雇用更多的工人超過實際需要完成的任務。

公平勞動標準法 》

Labor; Labor relations

通過在 1938 年,這一法律設定最低工資和加班費率和禁止童工州際貿易與工業。

秋天河流系統

Labor; Labor relations

工廠系統受雇男人、 婦女和兒童,使他們的住房沒有特別規定。

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