窒素代謝

ちっそたいしゃ

• nitrogen metabolism n

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窒素族元素

ちっそぞくげんそ

• nitrogen group (group 15 of the periodic table) n

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窒素循環

ちっそじゅんかん

• nitrogen cycle n

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脱窒

だっちつ

• denitrification; denitration n

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一酸化二窒素

いっさんかにちっそ

• dinitrogen oxide n

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