The story begins, in a sense, in classrooms around the world, where students are taught that the rate of decay of a specific radioactive material is a constant.
这个事情要从世界各地的教室里说起，在那里学生学习到特定核素的衰变速率是恒定的。
For a stationary, adiabatic flow the specific energy E, specific angular momentum L and mass accretion rate M are constant in space.
对于静态、绝热吸积流，比能量E、比角动量L和质量吸积率M都是空间的常量。
The increase of AP specific surface area lead to decrease of initial decomposition temperature, decomposition peak temperature and decomposition activation energy, but reaction rate constant rise.
AP比表面积的增大会导致推进剂初始分解温度、高低温热分解峰温和高低温下分解反应活化能的降低，但分解反应速度常数随AP比表面积的增大而增大。
The rate at which amino acid changing mutations accumulate in genes for specific proteins tends to be constant over time.
在编码特定蛋白质的基因上发生氨基酸变化的突变的积累速率是恒定的。
The rate at which amino acid changing mutations accumulate in genes for specific proteins tends to be constant over time.
在编码特定蛋白质的基因上发生氨基酸变化的突变的积累速率是恒定的。
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