搜索和广告是一把利箭的双刃。

Search and advertising thus become the matched edges of a sharp sword.

圆盾剑士皆轻甲简盔，装备金属圆盾和锋利托莱多双刃长剑。

Superior swordsmen wearing light armour and an open helmet, and armed with a double-edged sword and buckler.