VOA慢速英语:阳光把薄薄的塑料屏障变成了杀菌材料

germ – n. an organism known to cause disease

journal – n. a publication, such as a magazine or newspaper

packaging – n. material used to contain something

transmissible – adj. able to be spread to other people

approach – n. a method; a way of doing things

novel – adj. new or unusual

contamination - n. the process of polluting; the act of harming something