

品質を調べるため、製品から標本を取り出します。
この金属の標本は研究室に保管してあります。
標本の数が少なすぎると、正確な結果は出ません。
"ひょうほん(標本)" is in the lesson "Manufacture" (Level 37), along with 14 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.