The commandos pushed forward under the covering fire of their artillery.
突击队在炮兵的火力掩护下向前推进。
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-科技 It is composed of what sounds like a bizarre mixture: fly-ash, a fine-grained waste product from coal-fired power stations; carbon nanotubes, cylindrical molecules made of elemental carbon; and two binding agents, sodium silicate and sodium hydroxide.
煤灰,火力发电厂排放的细颗粒废弃物;碳纳米管,即柱状的碳分子;还有两种黏合剂:硅酸钠和氢氧化钠。
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