Storms swept the country, closing roads, buffeting ferries and killing as many as 30 people.暴风雨席卷全国，使道路无法通行，渡船受袭，多达30人遇难。Ferries are very powerful and manoeuvrable compared to cargo ships.与货船相比，渡船马力大而且易操纵。All the ferries...
幸而, 目下已有兼备高磁导率和低磁导率损耗的铁和铁合金,可资利用.Fortunately, iron or iron alloys are available which combine high permeability with small hysteresis loss.铁合金是炼钢的重要和不可缺少的原材料之一.Ferrous alloy is one of important and indispensable raw mate...