Potamogeton

常见例句

用作名詞 (n.)

• The existence of bract primordium during the early stages in many species of Potamogeton indicates that the absence of bract in mature flowers should be the result of reduction.
  在花原基早期發育的過程中苞片原基的存在表明眼子菜屬植物成熟花中缺乏苞片是簡化的結果。
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