Jisho

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きあつたに 気圧の谷
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Expressions (phrases, clauses, etc.), Noun
1. low pressure trough​
Wikipedia definition
2. Trough (meteorology)​A trough is an elongated region of relatively low atmospheric pressure, often associated with fronts. Unlike fronts, there is not a universal symbol for a trough on a weather chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked as a dashed line. In the UK, Hong Kong or Fiji, it is represented by a bold line extended from a low pressure center or between two low pressure centers; in Macau or Australia, it is a dotted line.
Read “Trough (meteorology)” on English Wikipedia
Read “気圧の谷” on Japanese Wikipedia
Read “Trough (meteorology)” on DBpedia

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