Last Updated：2025/11/20
Sentence
地質学者たちは、古い緑色岩帯で約32〜28億年前にさかのぼるストロマトライトの化石を発見した。
Quizzes for review
Geologists discovered stromatolite fossils dating back to the Mesoarchean in ancient greenstone belts.
See correct answer
Geologists discovered stromatolite fossils dating back to the Mesoarchean in ancient greenstone belts.
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
