oil bug
Having virions (especially of HIV) in the blood
present participle of precast
(petroleum industry, slang, US, dated) A microfossil, particularly a foraminiferan.
Third-person singular simple present indicative form of co-found
ベテランの地質学者は薄片標本の中にある有孔虫の微化石を指さして微笑み、それが古代の海成堆積物を示唆する小さな生物であることを認識した。
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