The spin-down rate has been measured for almost every radio pulsar, and theory indicates that it depends on the strength of the star's magnetic field. 這種自轉變慢的速率，幾乎每一顆無(wú)線(xiàn)電波霎都量得到，而理論指出，此速率和星體的磁場(chǎng)強度有關(guān)。
The number of permanent magnets is two or more than two, the two poles of each magnet are arranged staggeringly to produce the alternate magnetic field. 本發(fā)明的保健牙刷克服了現有磁癖牙刷中的磁場(chǎng)強度不夠，療效不明顯及刷毛的倒毛現象等缺點(diǎn)。
