钉子dīng·zi 1.金属制成的细棍形的物件,一端有扁平的头,另一端尖锐,主要起固定或连接作用,也可以用来悬挂物品或做别的用处。{nail; tapered piece of metal with a pointed end and a flattened head, mainly used to fix things, hold pieces or parts together, hang things on, etc.} 2.〈比喻fig.〉难以处置或解决的事物{hard nut; sth. that is difficult to handle}: ～户。{sb. who refuses to move but bargains for high compensation when his land is requisitioned for a construction project} 3.〈比喻fig.〉埋伏的人{mole; planted agent}: 安插～。{plant an agent or a spy}