微量元素
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- trace element n
- micronutrient n
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ビ
かす.か
delicate; minuteness; insignificance
リョウ
はか.る
quantity; measure; weight; amount; consider; estimate; surmise
ゲン • ガン
もと
beginning; former time; origin
ソ • ス
もと
elementary; principle; naked; uncovered
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