It is not, in principle, necessary for a biological system to age and die.
原则上来说，生物系统的衰老和死亡都不是必然的。
The immune system is the biological system in your body which fights off diseases.
得了艾滋病（增补）意味着一个人的免疫系统出了毛病。
Introduction of the theory and mechanism of the biological immune system.
介绍了生物免疫系统的原理和机制。
We introduce how to apply PLC in control system of the biological cultivation room.
介绍了P LC如何应用于生物培育房控制系统。
Synthetic biological pond system is a new type of stabilization pond system.
综合生物塘系统是一种新型稳定塘系统。
In the biological class, has studied the living system material circulation.
生物课上，学了生物系统的物质循环。
Objective: To synthesize new buffers for biological reaction system.
目的：合成一种应用于生物反应体系的新型缓冲剂。
Viewing a biological association as a system has at least two advantages.
把一个生物群丛作为一个系统来看到至少有两个好处。
Recently the system has been used in the fields of biological science and medicine.
近年来该系统在生物学和医学领域的应用日益受到人们的重视。
Second , text analysis, build up cultural value orientation system of biological subjects.
其次，文本分析，构建生物科目人文价值取向体系。
Second , text analysis, build up cultural value orientation system of biological subjects.
其次，文本分析，构建生物科目人文价值取向体系。
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