《汉书·志·地理志下》
从危星四度到斗星六度，称作析木的位置，是燕国的分星。
自危四度至斗六度，谓之析木之次，燕之分也。
From the fourth degree of the dangerous star to the sixth degree of the Big Dipper star is called the Ximu position, and is the dividing star of Yan.
<s>[INST] Kindly elucidate the central themes in this passage in English: 自危四度至斗六度，谓之析木之次，燕之分也。 [/INST] From the fourth degree of the dangerous star to the sixth degree of the Big Dipper star is called the Ximu position, and is the dividing star of Yan.</s>
Kindly elucidate the central themes in this passage in English: 自危四度至斗六度，谓之析木之次，燕之分也。
user
From the fourth degree of the dangerous star to the sixth degree of the Big Dipper star is called the Ximu position, and is the dividing star of Yan.
assistant