Last Updated：2025/12/07
Sentence
地質学者たちは、数百万年前に海洋の溶存酸素が大幅に枯渇した期間が広範な海洋生物の絶滅を引き起こしたと考えている。
Quizzes for review
Geologists believe an anoxic event triggered widespread marine extinctions millions of years ago.
See correct answer
Geologists believe an anoxic event triggered widespread marine extinctions millions of years ago.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
