他们已用栏杆把草地和新铁道的路堑隔离开来.They have railed the meadows off from the new railway cutting.铁道的栅栏阻止行人跨越轨道.The railroad gates debar people from crossing the tracks.综合治理电气化铁道的谐波和无功均要求动态补偿无功功率.The composite compensation of harmonic ...