名词中文翻译
中文翻译：外核层
同义词：
['outer crust', 'outermost layer']
例句：
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1. The outer mantle is where the Earth's magnetic field is strongest.
外核是地球磁场最强烈的区域。
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2. The outer mantle is made up of molten iron and nickel.
外核由液态的铁和镍组成。
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3. The study of the outer mantle is crucial for understanding the Earth's internal structure.
研究外核对于理解地球内部结构至关重要。