Triangulum:
Triangulum is a small constellation in the northern sky.
en.wikipedia.org
三角座:
三角座（Triangulum, traɪˈæŋgjʊləm）是一個北天星座，面积131.85平方度，占全天面积的0.320%，在全天88个星座中，面积排行第七十八位。
zh.wikipedia.org
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Triangulum三角座