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biennial▼◼◼◼adjective[UK: baɪ.ˈe.nɪəl] [US: baˈje.niəl]
spread over two years▼[UK: spred ˈəʊv.ə(r) ˈtuː ˈjiəz] [US: ˈspred ˈoʊv.r̩ ˈtuː ˈjɪr̩z]
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