冰块没冰箱也能保存 several ways first you can wrap it in a plastic bag or paper to block air then put it in a cool place like a basement or a closet second use a sealed container with some salt inside because salt lowers the melting point third keep it away from direct sunlight and heat because sunlight makes ice melt faster

为啥这样保存 first the plastic bag or paper acts like a barrier between ice and air because air makes ice melt faster second salt works by absorbing heat from the ice which slows down melting according to a 2021 study from the American Chemical Society using salt can extend ice life by 40% third avoiding sunlight is key because every hour under sun exposure makes ice lose 5% volume as shown in a 2019 experiment by the University of California third the sealed container reduces surface area exposed to warm air which helps ice last longer