围棋术语。基本死活之一。一块棋被围,其眼位是直线形状的三个交叉点,称为“直三”。如图中形势,若轮黑方走,下在A位可做活;若轮白方走,在A位破眼,黑子只有一只眼,黑被白杀。
直三角形 rectangular triangle
偏直三角螺纹 buttress thread
直角三角形 [数] right triangle ; right angled triangle ; rectangular triangle
垂直三通 VERTICAL TEE
两岸直接双向“三通” direct and two-way links of mail service, transport and trade
直三面角 [数] rectangular trihedral angle
两岸全面直接双向“三通” direct and two-way links of mail service, transport and trade
三直步 Three Step ; Three e Step
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