rhizobium formation的用法和樣例：
例句
- Nodules are not found on all species of legumes, nor are all species of Rhizobium capable of making nodules on leguminous plants.
不是所有的豆類植物中都能找到根瘤，也不是所有的根瘤菌都能在豆類植物中形成根瘤。 - The symbioses between Rhizobium and legumes and between Frankia and certain tree species reduce atmospheric N2 to forms available to the plant.
根瘤菌與豆科植物，弗蘭克氏菌與某些樹種形成的共生關係可以把空氣中氮氣還原成對植物有效形態。
