observed frequency [统计] 观测频率 ; 观察频数 ; 观察次数 ; 观测频数
Local observed frequency model 局部观测频率模型
Global observed frequency model 全局观测频率模型
lowest observed frequency 最低观测频率 ; 测得最低频率
maximum observed frequency 最高观测频率 ; 可观察的最高频率
Observed joint frequency 观察的联合次数
observed frequency distribution 实测频率分布
This change in observed frequency 这可观测频率中的变化
When a vibrating source of waves is approaching an observer, the frequency observed is higher than the frequency emitted by is lower than that emitted.
当振动着的波源逐渐靠近观测者时，测量到的频率比从波源发出的频率高。
When biologists say that they have observed evolution, they mean that they have detected a change in the frequency of genes in a population.
当生物学家说他们观察到进化时，意思是他们发现了一个种群中基因频率的变化。
Models of acute crush injury of sciatic nerve in rabbits were established, and were (observed) by high-frequency ultrasonography 1, 2, 4 and 8 weeks respectively after damage.
建立兔坐骨神经急性挤压伤模型，损伤后第1、2、4、8周，分别应用高频超声在同一水平上观察双侧坐骨神经的变化。
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