一把坚实的大锁挂在大门上,一根铁杆费了九牛二虎之力,还是无法将它撬开。钥匙来了,它瘦小的身子钻进锁孔,只轻轻一转,大锁就“啪”的一声被打开了。铁杆奇怪地问:“为什么我费了那么大力气也打不开,而你却轻而易举地把它打开了呢?”钥匙说:“因为我最了解它的心。”大道理:每 A solid big lock hung on the gate, and an iron bar cost a fortune and couldn’t pull it apart. The key came, and it leaned into the keyhole with a thin body, only gently turning, and the big lock was opened with a bang. The hardcore asked strangely, “Why I couldn’t open the door with so much effort, but you opened it easily?” The key said: “Because I know it best.”