研究结果表明，电脉冲处理对铝硅合金凝固组织中的共晶硅起到很好的细化和粒化作用，达到了类似化学变质的效果；
The results of the experiment show that the eutectic silicon become small and granular by electric pulse discharging, which like the effects treated with chemical modification .
他说道，血腥玛丽内的化学物质属于“高度不稳定型”，而且因为西红柿汁中存在着酸性物质，这种酒很容易变质。
The chemicals in a Bloody Mary are 'highly unstable' - and its quality tends to deteriorate quickly because of the acids in the tomato juice, he said.
一张配方都对抗其因化学降解而导致的变质。以及防止它受到杂菌污染及过度的热量，光能，湿气导致的破坏性影响。
The formulation must be preserved against decomposition due to chemical degradation and protected from microbial contamination and the destructive influences of excessive heat, light, and moisture.
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