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並前往https://www.reddit.com/r/grammar/comments/258vbv/if_something_is_biannual_does_it_occur_every_two/

If something is biannual, does it occur every two years or twice ...

Same question for semiannual. ... Biannual means twice a year. Biennial means every two years. ... I certainly hope these two words have different pronunciations.

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