《汉书·志·五行志下之下》
鹄水鸟，六只是阴数，回飞，是欲进反而后退。
鶂，水鸟，六，阴数；退飞，欲进反退也。
Swan is a water bird, six is a yin number, flying around, is wanting to advance but actually retreating.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 鶂，水鸟，六，阴数；退飞，欲进反退也。 [/INST] Swan is a water bird, six is a yin number, flying around, is wanting to advance but actually retreating.</s>
Explain the meaning of this Classical Chinese passage in English: 鶂，水鸟，六，阴数；退飞，欲进反退也。
user
Swan is a water bird, six is a yin number, flying around, is wanting to advance but actually retreating.
assistant