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Arts & crafts

Arts & crafts comprises a multitude of activities and hobbies that involve making things with one's hands, usually from scratch. They can be sub-divided into 'handicrafts'( or traditional crafts ) that are fashioned in an old style using long practised techniques, and the rest which are more modern inventions that have become recent trends or fads.

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拮抗作用

Environment; Environment statistics

反對影響生產的藥物、 激素和其他物質生活的系統上。

污水處理

Environment; Environment statistics

有機廢物和廢水產生的住宅和商業場所。

淨提取水

Environment; Environment statistics

返回的水和管網末梢水之間的區別。請參閱 還水的抽象。

生態平衡

Environment; Environment statistics

平衡,和生物與環境的和諧共存。

發酵

Environment; Environment statistics

不完整的分項數位的食物分子,尤其是糖類、 在無氧。

酸化

Environment; Environment statistics

氫離子,通常表示為環境介質的 pH 值的增加。

生化需氧量 (BOD)

Environment; Environment statistics

溶解氧生物為目前在水中的有機物質的有氧分解所需。

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