《宋史·志·卷二》
云气侵犯，星色黑，是北方军队撤退；星色苍白，北方人得病。
云气犯，黑，为北兵退；苍白，北人病。
When the clouds invade and the stars are black, the northern army will retreat; when the stars are pale, the people in the north will get sick.
<s>[INST] Translate the following Classical Chinese text into English: 云气犯，黑，为北兵退；苍白，北人病。 [/INST] When the clouds invade and the stars are black, the northern army will retreat; when the stars are pale, the people in the north will get sick.</s>
Translate the following Classical Chinese text into English: 云气犯，黑，为北兵退；苍白，北人病。
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When the clouds invade and the stars are black, the northern army will retreat; when the stars are pale, the people in the north will get sick.
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