The world's deepest drill is about to get taller-tall enough to dig into Earth's semi-molten interior.
世界上最深的钻机即将变得更高——高到足以钻进处于半溶化状态的地球内部。
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Most hand samples show abundant semi-plastic features, such as twisted shape and molten crust, which might be caused by their flying in the air in the molten or semi-molten status.