Since its chemical character is very active, Mg alloy is prone to oxidation and burning, which makes it impossible to be melted and cast in air.

但由于镁的化学性质活泼，非常容易氧化、燃烧，导致镁合金无法在大气条件下直接进行熔炼和浇注。

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Because of the special physical and chemical character, the nanomaterials has been applied in many fields, and brings enormous progress to people's life.

由于纳米材料的特殊理化性质，使其有广泛的应用领域，给人们的生活带来巨大的进步。

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Methods: Compare study develops between hogwash oil and edible oil and wants to find especial, discriminating, physical and chemical character in laboratory.

方法：将潲水油与正品食用油进行对照研究，寻找潲水油特有的可在实验室进行检测的理化指标。

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Due to the inherent character of chemical agents, the ease with which they can be concealed, and the great similarities between facilities that manufacture them and those that make non-military chemical products, there is no effective way to monitor covert CW programs.

CENTERFORSECURITYPOLICY: Chemical Warfare: Beware Bush��s Perilous Delusions