They aim to establish the average ice thickness of 10 sites using power drills, snow depth measurements and GPS readings.

他们目标通过电钻，冰雪测量仪器和GPS得出10个地点的海冰厚度平均值。

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Third, using warnings only during the development cycle is like doing fire drills with real extinguishers, then using paper cups to douse the real fire.

第三，仅在开发周期使用警告就象使用真正的灭火器来进行防火演习而使用纸杯来扑灭真正的火一样。

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They'd started using 'harmonic drills in their mines. The stone was unhappy.

他们在矿井里用谐和钻孔机，让石头不高兴了。

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Shi Yuanhua, Koreas expert at Fudan University in Shanghai, tells China Daily that North Korea's threat to cancel the armistice is in protest against ongoing US-South Korean military drills using more powerful weapons and to "prompt Washington back to the negotiating table".

BBC: China media: Wen's mixed legacy