单词：nitrogen deficiency
nitrogen deficiency的用法和样例：
例句
- Corn is one of the best indicators for nitrogen deficiency among the field-crop plants.玉米是大多数大田作物中缺氮的最好的指示植物。
- In some plants, a mild nitrogen deficiency at certain stages of development may be desirable.许多植物中，轻度缺氮在其发育的某些阶段可能是适宜的。
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