The individual variation may be caused by many factors, such as genetics, environment, disease stage and diet, etc, among which genetic polymorphism is a common and uncontrollable factor.
这种差异可能是由遗传、环境、疾病状态或饮食结构等诸多因素引起的。其中基因(遗传)多态性是导致药物代谢个体差异的较为常见且不可调控的因素。
Temperature is an important factor which affected the precision of the electrical instruments. Acute change of temperature had an uncontrollable effect on the circuit.
温度是影响电子测量仪器精度的一个重要因素，温度的变化会对电路产生随机的和不可控制的干扰。
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