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        "quote": "于是球体的北极就是一个[<u class=\"concept-term\" data-concept-reference=\"concepts/quantum-mechanics/spin\" data-concept-identity=\"urn:uuid:f279d758-ab16-4805-a63d-086d2d235785\" data-concept-route=\"/concept-identities#concept-f279d758-ab16-4805-a63d-086d2d235785\" id=\"first-04fc72557d53faf6f9f4-zh\">“自旋向上”态(spin-up state)</u>](../../../../../concepts/quantum-mechanics/spin.md)，南极则是一个[<u class=\"concept-term\" data-concept-reference=\"concepts/quantum-mechanics/spin\" data-concept-identity=\"urn:uuid:e3156275-3f46-409b-b74c-452208f4fdcb\" data-concept-route=\"/concept-identities#concept-e3156275-3f46-409b-b74c-452208f4fdcb\" id=\"first-d0ebd8ed9f05e242417f-zh\">“自旋向下”态(spin-down state)</u>](../../../../../concepts/quantum-mechanics/spin.md)。赤道上有两个点分别对应于 $S_1$ 取确定值的态，另有两个点分别对应于 $S_2$ 取确定值的态。",
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