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A region of low pressure with roughly concentric isobars is known technically as a cyclone.
具有大致同心的等压线的低压区在技术上称为气旋。
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Love each other and happiness with concentric happiness.
相亲相爱幸福永，同德同心幸福长。
youdao
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Love each other and happiness with concentric happiness.
相亲相爱幸福永，同德同心幸福长。
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