A new computational scheme was developed to solve a three-dimensional model of a periodic flow reversal reactor by ADI alternating direction implicit method.(文中針對圓管式徑向對稱流向變換反應器三維模型，利用交替方向隱式方法(adi)建立新的求解格式。)

If the Earth's magnetic pole reversal caused by biological extinction, it is not difficult to explain why from time to time, so that the periodic destruction of the Earth civilization.(假如地球磁極逆轉而造成生物大量滅盡，那就不難表明為何每隔一段時間，使地球文明周期性的毀滅。)

The existence and uniform boundedness of the global solutions of the model for sulphur dioxide oxidation in a tubular reactor with periodic flow reversal are proved by the invariant domain method.(利用不變區域方法，證明了二氧化硫催化氧化管式反應器流向變換強制操作模型整體解的存在性和一致有界性。)

The reversal process is not literally periodic as it is on the sun, whose magnetic field reverses every 11 years.(倒轉過程不是真正具有像在太陽上那樣的周期性，太陽磁場每11年出現倒轉。)