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Why Lightning Rods Don’t Attract Lightning But Provide Safe Discharge Paths
避雷针并不吸引雷电,而是提供安全放电路径
精读先不看文字,完整听一遍。
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Lightning rods do not increase the chance of a strike—they simply offer the easiest path to ground.避雷针不会增加遭雷击的概率,只是为电流提供一条最易通向大地的路径。
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Their pointed tip enhances local electric field strength, encouraging ionization of surrounding air molecules.其尖端能增强局部电场强度,促使周围空气分子电离。
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Once ionized, air becomes conductive and forms a preferential channel for lightning’s downward leader.空气电离后变为导体,从而形成闪电下行先导的优先通道。
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Copper or aluminum rods connect via low-resistance cables to deeply buried grounding rods.铜或铝制避雷针通过低电阻缆线连接至深埋地下的接地极。
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This system safely directs massive current around structures instead of through flammable materials.该系统可将巨大电流安全绕过建筑物,而非穿过易燃材料。
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Proper installation requires grounding resistance below 25 ohms to prevent side flashes or voltage surges.正确安装要求接地电阻低于25欧姆,以防侧击或电压浪涌。
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Rods protect a conical zone extending outward at a 45-degree angle from the tip.避雷针保护范围呈圆锥形,从针尖向外以45度角延伸。
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Modern buildings often integrate meshed conductors into roofs for more uniform protection coverage.现代建筑常在屋顶嵌入网状导体,实现更均匀的防护覆盖。
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Surge protectors work alongside rods to shield electronics from induced voltage spikes.浪涌保护器与避雷针协同工作,保护电子设备免受感应电压尖峰损害。
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Without such systems, lightning could explode bricks, shatter concrete, or ignite gas lines instantly.若无此类系统,雷击可能瞬间炸裂砖块、震碎混凝土或引燃燃气管道。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Surge protectors work alongside rods to shield electronics from induced voltage spikes. 浪涌保护器与避雷针协同工作,保护电子设备免受感应电压尖峰损害。
- Copper or aluminum rods connect via low-resistance cables to deeply buried grounding rods. 铜或铝制避雷针通过低电阻缆线连接至深埋地下的接地极。
- This system safely directs massive current around structures instead of through flammable materials. 该系统可将巨大电流安全绕过建筑物,而非穿过易燃材料。
④ 懂 · 选一选
⑤ 今天会说这一句
Surge protectors work alongside rods to shield electronics from induced voltage spikes.
⑥ 跟读并录音
Surge protectors work alongside rods to shield electronics from induced voltage spikes.
第一版:录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达,自己说一句。
例子:Surge protectors work alongside rods to shield electronics from induced voltage spikes.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中,敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课,可以去陈老师带读社(和自学通行不是同一份会员)。
课程开发中,敬请期待。