圆盘
英:[dɪsk]
美:[dɪsk]
n.
圆盘 圆片 (计算机)磁盘，磁碟 椎间盘
例句:
The colours rotated round on a disc and were reflected onto the wall behind.
圆盘上色彩流转，反射到后面的墙上。
复数:discs
function fun(str){var arr=str.split('')
arr.splice(2,3,"*","*","*")
str=arr.join('')
console.log('输出：'+str)
}
var str='abcdefg'
console.log('输入：'+str)
fun(str)
