研究人员们怀疑，冬季的低温、潮湿、紫外线等条件会增加病毒的稳定性，缩在屋子里的人们也一样会方便它的传播。
Researchers suspect that lower temperature, humidity, and ultraviolet light during the winter may increase viral stability; people huddling indoors may facilitate spread as well.
但也存在某些不足，如改性沥青加工过程中的温度老化、贮存稳定性及在紫外线作用下降解加速材料老化等问题。
However, some drawbacks exist, such as high temperature agi ng in process of modification, low storage stability and degradation acceleration under ultraviolet.
结果：发现这些因素均影响水合氯醛的稳定性，其中以紫外线照射及碱性物质影响最大。
Results: it was found that all of these factors had influence on the stability of chloral hydrate.
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