... lighting 采光 lightning activity level 闪电活动度<雷击的相对频率 lightning arrester 避雷装置 ...
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Another factor that needs considering is the level of lightning activity in early February in the region around Rome - something the UK's Met Office is able to monitor and record with the help of a system of sensors dotted around Europe.
BBC: What is the chance of lightning striking St Peter's?
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