Last Updated：2025/12/01
Sentence
地元の保護活動家たちは、白亜（チョーク）層を流れる小川とその独特の生態系を守るために活動している。
Quizzes for review
Local conservationists are campaigning to protect chalk streams and their unique ecosystems.
See correct answer
Local conservationists are campaigning to protect chalk streams and their unique ecosystems.
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