It is difficult to analyse Freud's doctrine of psychoanalysis.
分析弗洛伊德的精神分析理论很困难。
It is difficult to analyse the sampling Control system with pulse width modulation.
对宽度调制的脉冲系统的分析比较困难。
Societies are notoriously difficult to analyse because of their incredible complexity.
出于其难以置信的复杂性，社会是非常难于分析解释的。
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