常見例句雙語例句Some particles are focussing on the neutral region, which is caused by the drift under the action of an electric field along the neutral line.小擾動方法不能使用于中性線的區(qū)域內(nèi)，在這個區(qū)域出現(xiàn)一個與小擾動漂移運動相反方向的運動。 返回 focussing field