会話トレ Drill: 製造業 Manufacturing
光触媒 (hikari shokubai)
photocatalyst
a photocatalyst
semiconductor-based photocatalysts
半導体光触媒 (handoutai hikari-shokubai)
不具合 (ふぐあい)
defect
a defect
a photocatalyst
a defect
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