冷锋是一团移动着的冷气流的前锋面。

A cold front is the forward edge of a mass of moving cold air.

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春季，暖气流北上并与冬天残留的冷气流相遇。

During spring, warm air moves north and mixes with cold air remaining from winter.

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春季，暖气流北上并与冬天残留的冷气流相遇。

During spring, warm air moves north and mixes with cold air remaining from winter.

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