cold aging

例句：

1. 1. The old building is showing signs of cold aging.
   这座老建筑正显示出冷老化的迹象。
2. 2. The research on cold aging has been a hot topic in recent years.
   近年来，关于冷老化的研究已成为热门话题。
3. 3. To prevent the building from getting cold aging, we need to regularly check its insulation.
   为了防止建筑物出现冷老化现象，我们需要定期检查其保温情况。