2025年2月，全球矿业巨头英美资源集团（Anglo American Plc）的股价较2022年峰值缩水逾60%，其核心资产戴比尔斯（De Beers）的钻石开采计划被砍至2600-2900万克拉，创下本世纪最低产能目标。

The incredible power of magnetism brings objects to life through precise diamagnetic levitation. With carefully controlled forces, materials defy gravity, creating a mesmerizing floating effect.

2025年2月，全球矿业巨头英美资源集团（Anglo American Plc）的股价较2022年峰值缩水逾60%，其核心资产戴比尔斯（De Beers）的钻石开采计划被砍至2600-2900万克拉，创下本世纪最低产能目标。

Download here CBSE Class 12 Physics additional practice sample paper prepared by experts for extra strong CBSE 12th Board ...

据公开资料，钻石巨头“戴比尔斯”近年来屡次削减毛坯钻石价格，降幅高达40%以上，这场“价格风波”不仅震撼业界，还促使另一巨头“阿尔罗萨”试图通过销售暂停来平稳市场，不过未能奏效。

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Pauling, L., “Nature of the Chemical Bond”, 119 (Cornell Univ. Press, Ithaca, 1948).

Understanding the brain and its activity is one of the great challenges of modern science. Normal brain activity (cognitive processes, etc.) has been extensively studied using electroencephalography ...

ALMA observations of the protoplanetary disk around HD 142527. The white bars show the directions of the magnetic field revealed by the orientation of the dust grains. The strength of the magnetic ...