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1.This compound is used as a preservative in food packaging.
这种化合物被用作食品包装的防腐剂。
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2. The chemist mixed the compound to create a new pigment.
化学家将这种化合物混合以创造一种新的颜料。
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3. The toxicity of this compound has been studied extensively in recent years.
近年来，这种化合物的毒性已经得到了广泛的研究。