Various overlay mediums, such as agar, starch gel, methyl cellulose and tragacanth are used . 常用的覆盖培养基有：琼脂、淀粉凝胶甲基纤维素和黄蓍胶等。
Such media may have enjoyed a measure of definition, so far as the investigators were concerned . 就研究者们来说，这样的培养基可能已达到某种程度的规定。
However biochemists have achieved certain steps of the multiplication process in cell-free media . 可是，生物化学家已完成了在无细胞培养基上增殖过程的某些阶段。
This line of reasoning led koch to adopt meat infusions and meat extracts as the basic ingredients in his culture media . 这种想法引导Koch采用了肉汤和肉膏作为他的培养基的基本成分。
Some bacteria cannot be enriched in defined media because they have extremely complex nutritional requirements . 有些细菌不可能用合成培养基进行加富培养，因为它们的营养需要太复杂了。
The manufacture of thiamine from the simple substances present in the minimal medium does not take place in a single chemical reaction . 从最低培养基中的简单物质制造硫胺素，不是通过单一的化学反应。
Scientists must either adapt the culture to produce more gametes or develop some other way to grow them in quantity . 科学家们如果不去改进这种培养基以便生产更多的配子，就要研究另外大量生长配子的方法。
The most common means of agitation of liquid media is by placing the culture vessels on a drum (for test tubes) . 液体培养基最普通的摇动方式，要把培养器皿放置于围绕一根近水平的轴缓慢旋转的圆筒（用于试管）。
Activated charcoal is added to nutrient media mostly to remove toxins present in agar, or aromatic waste products excreted by cultured tissues . 把活性炭加到营养的培养基里，主要是为了除去存在于琼脂中的毒物，或都除去由培养的组织所产生的芳香性废物。
Optimization of one isolate bacillus subtilis 一株枯草芽孢杆菌发酵培养基的优化
