据估计，他们购买的飞机数量是市场可承受量的两倍。
By some estimates, they bought twice as many aeroplanes as the market could support.
本文论述了利用平滑秩图可估计出信源的相干结构。
The SRP is the key to estimate the source coherency structure and total signal number.
本文论述了利用平滑秩图可估计出信源的相干结构。
The SRP is the key to estimate the source coherency structure and total signal number.
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