m & Km 测量距离
XSP-KM M 对讲麦克风
·2,447,543篇论文数据，部分数据来源于NoteExpress
Phase two would cover an area of over 16 sq m (40 sq km) along the eastern boundary of the phase one area.
BBC: RSPB to oppose windfarm plan in Thames estuary
When completed, the London Array will be one of the world's largest offshore wind farms covering an area of 90 sq m (232 sq km) between Margate and Clacton.
Such meteor strikes are rare in Russia but one is thought to have devastated an area of more than 2, 000 sq km (770 sq m) in Siberia in 1908.
BBC: Meteorite fragments found in Russia's Urals region
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