An "affix" is the collective term for the type of formative that can be used, only when added to another morpheme (the root or stem).

词干与词相似，它是可以加词缀的任何一个词素或词素结合体。

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The nitrite contents and its change speed in leaf vegetables was obviously higher than that in melon or fruit vegetables and root or stem vegetables.

叶菜类蔬菜中的亚硝酸盐含量及其变化速率均明显高于瓜果类和根茎类蔬菜。

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Methods The crude drugs of root or stem of Tripterygium wilfordii Hook. were extracted by water or ethanol. The film-forming preparations were made of different extractives.

方法雷公藤根或茎的水或乙醇提取物入药制备成涂膜剂，采用大鼠完全佐剂性关节炎模型，观察不同药物组对原发性肿胀和继发性肿胀的影响。

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The echinacea sold in drugstores comes in a wide range of liquids, pills, powders, and tinctures, which can be derived from some combination of the plant's root, flower, or stem.

CNN: Echinacea fails to curb the common cold (again)