Polluted insulators may flashover at any time under disadvantage weather conditions.在恶劣的自然环境下,积污绝缘子随时可能发生闪络.In comparison with simulation tests, the mechanism of guano - caused flashover is basically clarified.通过模拟试验的对照,...
It's been one of the coldest autumns for years.这是多年来最冷的秋天.Autumns and winters were high - occurrence seasons for the flu.秋冬季是流感的高发季节.Curled up to fall for a ground autumns.卷起落了一地的寂秋....
如果把这块湿地的水排干, 这块地就会成为良田.If this wet land was drained, it would be good farmland.许多人不理解湿地的重要性.Many people do not understand the importance of wetlands.候鸟是湿地的主人.The migratory bird is a host of the wetland....