In dreams, you don't need to make any distinctions between things. Not at all. Boundaries don't exist. So in dreams there are hardly ever collisions.
相位裕度是系统在变得不稳定之前可以容忍的程度的度量。
译文:对于天下的士人,最可贵的是能够排除忧患,消除纷争,解决困难,而不去索要任何回报。