The phasing out of chlorofluorocarbons (CFC) - substances used in refrigerators, aerosol sprays and some packing foams - has stopped the ozone layer from being depleted further.
3
把它们揉成一团就可以当作如非降解泡沫芯片或巨量的泡沫包装一样的良好包装材料。
Scrunched up, they make just as good packing material as those non-degrading foam chips or reams of bubble wrap.