This association (which need not be invariable) casts doubt on the optimistic assumption that the positive growth rate of a population is evidence that it has yet to reach its optimum.
这种连系（无须是一成不变的）令人对所谓正数增长率表示人口还没有达致最佳点的乐观假定感到怀疑。
In tries to move in the process, the oscillation amplitude and the electric current besides change along with the voltage undulation should be stable invariable.
在试运行过程中，振幅和电流除随电压波动而变化外应该是稳定不变的。
The interference wave has strong energy over whole time period of seismic records, and its frequency, phase and amplitude can be basically considered to maintain invariable.
这种干扰波在地震记录的整个时间段上具有很强的能量，并且其频率、相位和振幅可认为基本保持不变。
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