外西北
外西北-
距今山西大同5英里外的西北方有一座紫色的长城，名曰紫关。
Five miles to the north-west of Datong in Shanxi Province there is a purple wall whose name is Purple Pass .
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外环线（西北段）桥梁伸缩缝质量控制
Quality Control for Expansion & Contraction Joints of Bridges in Northwest Section of Outer Ring Line
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结果表明，南海海域主要存在两大水系，即南海本地水（南海水）和外海水（西北太平洋水或黑潮水）。
The results show that two water systems exist in the South China Sea , namely , the local water of the South China Sea ( South China Sea water ) and the outer sea water ( Northwest Pacific water or Kuroshio water ) .