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Toys and games

1) Devices that are used exclusively for recreation and play. Toys are most often used with children and pets and as a medium of education and development. Toys are not always obvious in their nature. A simple bottle can be considered a toy if an individual uses it for recreational use. 2) Games are structural activities used for physical or psychological education. In most cases, games are recreation. However, games can also be considered work. For example, a professional soccer game is a career to the participants.

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Environment; Environment statistics

盛污染物、 廢棄物的培養基。又見的碳匯。

Environment; Environment statistics

生物與氣候的關係的科學研究。

載入

Environment; Environment statistics

污染物質的數量排入水體。

Environment; Environment statistics

不完全燃燒的材料後,空氣中懸浮粒子。

市場力量

Economy; Economics

當一個買方或賣方市場有能力對貨物和服務的交易或他們出售的價格的數量的重大影響力。市場權力不存在時有完美的競爭,但它不會什麼時候有壟斷、 壟斷權,權或寡頭壟斷。 ...

大氣擴散

Environment; Environment statistics

在大氣中的氣體或煙霧污染的稀釋的過程。

厭氧生物處理

Environment; Environment statistics

減少廢物,利用厭氧生物有機物質。

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