根据盖利森的意见，光可以通过不同的介质运行，如在通过冷冻的纳气时，光的速度实质上变慢了。 然而这是因为光线在运行介质里的原子之间时，会反复地反弹。
Light traveling through different mediums, such as chilled sodium gas, does slow substantially, but this is because the light is being bounced between the atoms within the medium.
而冷冻干燥的疫苗则在置入微针模子前与乙烯基吡咯烷酮单体混合、并在室温下用紫外光将混合物聚合。
Freeze-dried vaccine was mixed with the vinyl-pyrrolidone monomer before being placed into microneedle molds and polymerized at room temperature using ultraviolet light.
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