Our sun is on the Orion spiral arm, about two - third from the center.

太阳位于银河系的猎户臂，距离银心约为半径的三分之二。

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But the star forming regions seem more concentrated along the drawn-out (right side) spiral arm.

但恒星形成区域似乎更集中在长长的北部(右边)的旋臂上。

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The effect of spiral arm perturbation on the aggregation formation of giant molecular clouds (GMCs) is analyzed in this paper.

本文分析了在巨分子云聚合形成机制下旋臂扰动的影响。

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