tuff
Third-person singular simple present indicative form of freshen
plural of andrographolide
Alternative spelling of ray casting
(petrology) A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
地質学者は崖面から凝灰岩の試料を採取して、その鉱物組成を分析した。
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