持有期限(1holding period)或目标期限(target horizon)。它是指衡量回报波动性和关联性的时间单位,也是取得观察数据的频率,如所观察数据是日收益率、周收益率、月收益率还是年收益率...
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Uranium ore bodies are localized at the pinch out site of interlayer oxidation sandstone body in target horizon.
铀矿体主要产于目的层砂体层间氧化带尖灭部位。
Therefore, the Lower-Middle Jurassic is selected as the main target horizon for sandstone-hosted uranium deposit, and the Lower Cretaceous as the minor one.
因此,将中下侏罗统确定为本区的主要找矿目标层,下白垩统为次要找矿目标层。
Since the target is the Horizon, what can be left for the world is only the back view.
“既然目标选择了地平线,留给世界的只能是背影”这句话有什么深刻道理?。
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