地球目前的气候状态很是不稳定；在过去的70万年间，我们的星球大约经历了7次冰川时期。
The earth's current climate is something of an anomaly; in the past 700, 000 years, there have been at least seven major episodes of glaciers spreading over much of the planet.
地球目前的气候状态很是不稳定；在过去的70万年间，我们的星球大约经历了7次冰川时期。
The earth's current climate is something of an anomaly; in the past 700,000 years, there have been at least seven major episodes of glaciers spreading over much of the planet.
矿井高温体现了矿井目前的一种环境气候状态，要防止热害，就要研究矿井的环境参数。
The high temperature of mine embodiments a estate of environmental climate in mines at present. To prevent heat damage, we should research the environment parameters in mines.
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