Last Updated：2025/11/28
Sentence
地質学者は古い玄武岩の年代を決定するためにルビジウム-ストロンチウムの測定を行った。
Quizzes for review
Geologists used Rb-Sr measurements to date the ancient basalt.
See correct answer
Geologists used Rb-Sr measurements to date the ancient basalt.
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