stem nodule的用法和樣例：
例句
- Since the urease activity in soil is close correlated with the growth of stem lump mustard and soil metabolism, which is a key indicator of soil ecology and soil fertility.
土壤脲酶活性高低反映出莖瘤芥生長和土壤代謝狀況，可作為莖瘤芥土壤生態和肥力水平的一個良好指標。 - Methods of environmental investigation were adopted to study the contents of heavy metals in the soil at the tumorous stem mustard cultivation base in Nantuo, Fuling.
採用環境調查的方法研究了涪陵南沱鎮莖瘤芥種植基地土壤重金屬含量。
