名词
中文翻译：正温度系数
同义词：
['positive temperature gradient', 'positive temperature gradient coefficient']
例句：
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1. The material has a positive temperature coefficient that makes it more resistant to heat.
这种材料有一个正温度系数，使其对热更抗。
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2. In the case of a positive temperature coefficient, the rate of change is directly proportional to the change in temperature.
在正温度系数的情况下，变化率与温度变化成正比。
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3. The design of the circuit incorporates a positive temperature coefficient to ensure optimal performance under varying temperatures.
电路的设计包含了一个正温度系数，以确保在不同温度下都能提供最优性能。