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English word

occur

B1Academic AWL-1Frequent NGSL-1

UK /əˈkɜː(r)/US /əˈkɜːr/

verb

to happen

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Sentence 163 · Pro

Ban Ki-moon's Harvard Kennedy School Graduation Address (2023)

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In fact, scientists have been warning that the sixth mass extinction may occur in a hundred years.

Ban Ki-moon's Harvard Kennedy School Graduation Address (2023)

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