The words 'conversion' and 'treasure' can be both countable 可數名詞 and uncountable 不可數名詞 depending on the context.
In the programme Yang Li provides examples to show you how these two words are commonly used in everyday English.
She also looks at the verb form of these two words:
Conversion (noun) - to convert (verb)
Treasure (noun) - to treasure (verb)
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