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Trade show
A commercial exhibition show or event during which traders or companies can display and market their wares or services to the general public or to the paying attendants of a particular event.
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化學平衡
Chemistry; General chemistry
反應物和產品的濃度，有的國家尚未更改的時間，結果時，轉發的反應進行逆向反應率相同。的正向和反向反應率通常不為零，但反應物和產品的濃度相等，有沒有淨變化的反應。 ...
