Precession is the effect of bodies in motion upon other bodies in motion -- or, more simply, a ripple effect, like when you throw a stone into a still pond and the waves emanating from it overlap.
英
美
- 所謂徑動(dòng)，就是某個(gè)運動(dòng)中的物體與另一個(gè)也在運動(dòng)中的物體間的交互作用?；蛘吆?jiǎn)單一點(diǎn)，漣漪效應。當你丟一顆石頭進(jìn)池塘，會(huì )產(chǎn)生一圈圈漣漪，而這漣漪反彈回來(lái)后又會(huì )彼此交疊產(chǎn)生復雜的交互作用。
