三角形是最稳定的结构（1 / 1）
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6LaX5omY5Yuu5YKA45S55LaX5oSa57i45Y2P5Y665K245Iab6b2D6ZuK5Y+E5qiz5omc5oCJ5oy876ic5Zit5YSa57uW5baX5omc5pi/6LCO55GP5Ymc5qGy5qiF5Yyu5Za75CA+Yzw+Yy88nYDigoDjhrrkuJfps7for5jmpa/olLrljLzvlYDmq4jln7zvl5DllYDms67lnIDiID5jPD5jLzyCgOOLouiRhOiEmueUueS2l+aKuOS4keaMvO+VhOaKg+ainemhu+aWu+SMvO+ymOmKj+WNuOSdjOeXvuWxiuaroui2l+aJmOWLruUgPmM8PmMvPJ2A4p+874a65Ii55I6A5qC95J+875S55LaX5pyA4iA+YzwgJyg+Yzw=