But there are also dangers in such work, even though most biological laboratories have strict safety rules . 即使大多数的生物实验室都有严格的安全规定，但这种工作仍存在着危险。
What we call the evolutionary hypothesis is an explanation of a host of biological and paleontological observations . 我们所说的进化假说是关于生物学和古生物学的大量观察的解释。
Particulate matter in soils and aquatic systems reacts with and influences the biological activity of pesticides . 土壤和水系统中的颗粒物质都与农药的生物活动起反应，并影响后者。
We tend to distinguish one ecosystem from another according to the most apparent features of its biological components . 我们往往根据其中特征最明显的生物成分来区分不同的生态系统。
From a broader point of view, photosynthesis is but one of the interesting biological facets of chloroplasts . 从一个较广泛的观点看，光合作用只是叶绿体有意义的生物学特征中的一个。
Culture is that which men create for themselves and transmit to their successors by other than biological means . 文化是人们为自己创造，并使用生物学以外的其它手段留传给后人的事物。
This sewage-consuming biological process depends on a closely interrelated succession of species of animal plankton . 这种污水的生物净化过程就依赖着浮游动物种类的一种密切相关的演替。
These experiments left little doubt that appropriate light changes could override signals from the biological clock . 这些试验使我深信不疑，适当的光照变化能够克服来自“生物钟”的信号。
A change in waste water volume such as this could drastically affect the operation of a conventional biological treatment plant . 这样的废水量的变化可能强烈地影响传统生物处理站的运转。
Brazil is trying to develop energy from its immense resources of biological materials by literally growing its own fuel . 巴西脚踏实地生产自己的燃料，正试图从丰富的生物资源中开发能源。
