时变 time variant; time varying; time-variation; time-varying 时变场,随时间变化的磁场 time-varying field ..
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随时间变化 time history; time variation; time-variation; time-varying; variation with tim ..
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Time Variation 时间变化性 ; [物] 时间变化 ; 季节性变化 ; 随时间变化
time variation of gain 随时间而变化的增益
time-variation characteristic 时变特性
TVG Time Variation of Gain 增益的时变
time-to-time variation 时间与时间的变异
short-time variation 短期变化
In all communication channels, underwater acoustic channel is the most complex, and its fading, multipath effect, time-variation effect making many classic communication technologies can not be directly applied to underwater acoustic channel.
水声信道是所有通信信道中最为复杂的信道之一,其衰落、多径效应、时变性等特点使得许多经典的通信技术无法直接应用于水声信道。
参考来源 - 水下声扩频通信系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Experiments show that the technique is effective for processing unstable signals of time-variation spectra.
实验结果表明，该法是分析处理具有时变谱特性的非平稳信号的一种有效方法。
Colds mutate even while they're infecting you, and new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.
即使在感染你的时候，感冒病毒也会发生变异，而且新的病毒毒株经常出现，以至于当制药商研制出针对其中一种变异的疫苗时，血清已经过时了。
Scientists at the time often depended on the royal courts for patronage. But there was considerable variation in the relationships between the courts and scientists in different countries.
那时候的科学家基本上都依靠皇室提供财力支持。但在不同的国家，皇室和科学家的关系有极大差异。
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