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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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多氯聯苯 (polychloronated 聯苯)
Energy; General
一組用於製造塑膠的以前作為冷卻劑電力變壓器中的有機物。在環境中,多氯聯苯是對水生生物的毒性極強。他們長時間的堅持與環境,是生物累積的 ...