The straw mattresses are airing there.草垫子正在那里晾着.The researchers tested more than 20 mattresses of various materials.研究人员试验了二十多个不同材料的床垫.The results of the tests indicated that latex and polyurethane foam mattresses burned...
The straw mattresses are airing there.草垫子正在那里晾着.The researchers tested more than 20 mattresses of various materials.研究人员试验了二十多个不同材料的床垫.The results of the tests indicated that latex and polyurethane foam mattresses burned...