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patent  
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KK:[ˈpætṇt] DJ:[ˈpеitǝnt]

名複: patents  

動變: 過去式:patented  過去分詞:patented  現在進行時:patenting  

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單選題

An Indian scientist invented a(n) __ carrier bag, which will not cause any pollution and is edible. Many developed countries, including Taiwan, want to buy his patent invention.


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