... 低水位标；低潮线 low-water mark 下珥 lower arc 低层大气 lower atmosphere ...
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Arc lower 下弧形
lower tangent arc 下切弧
lower circumzenithal arc 下环天顶弧
On top of their lower labour costs, the mini-mills' electric-arc furnaces are much cheaper to build than iron-ore blast furnaces.
ECONOMIST: Steel: Rust never sleeps | The
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