In order to obtain higher measured accuracy of star's positions by the low-latitude meridian circle, it is needed to measure the astronomical refraction to the stars of different spectral types.

提出在低纬子午环上，对不同光谱型的天体测定出天文折射，以提高星位测定的精度。

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Sacrifice Circle Model is not a universal explanation about the compositions of the local society, for it not only neglects the historical latitude, but also the influence of other factors.

祭祀圈模式对于地域社会构成的解释不具有普遍意义，因为它既忽略了历史的维度，又忽略了其它构成要素的影响。

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