正文

New Water 'Bottles' Could Help Fight Plastic Pollution

2017-05-03来源:VOA

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Words in This Story

bubble – n. a tiny, round ball of air or gas inside a liquid

membrane – n. a thin sheet or layer

extract – n. a substance that you get from something by using a machine or chemicals

sphere – n. a round object

flexible – adj. capable of bending or being bent