There are two small sticks with a length of 4 cm and 6 cm respectively. Choose the small stick with a length of centimeters to form a triangle with the first two small sticks.
有二根小棒分别长4厘米、6厘米，选多少厘米长的小棒就能与前二根小棒摆成一个三角形．
<result>9</result>