fen soil的用法和樣例：
例句
- The diversity and community structure of AOB in red soil sample was mainly studied in this paper.
本文主要對紅壤荒草地土樣中的氨氧化細菌多樣性和群落結構進行分析。
上項目全權制作，受著作權保證，侵權案必究
- 令天網絡熱詞
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