Golang中slice和arry的区别是什么

package main
import (  "fmt"  "reflect")
func main() {  var arr [8]int = [8]int{1}  var arr1 [8]int  var slice, slice1 []int    fmt.Println("type of:", reflect.TypeOf(arr), reflect.TypeOf(slice))    arr1 = arr  fmt.Println("1: arr|arr1 of:", arr, arr1)  arr1 = [8]int{3}  fmt.Println("2: arr|arr1 of:", arr, arr1)    slice = append(slice, 2)  slice1 = slice  fmt.Println("3: slice|slice1 of:", slice, slice1)  slice1[0]= 5  fmt.Println("4: slice|slice1 of:", slice, slice1)  }output:type of: [8]int []int1: arr|arr1 of: [1 0 0 0 0 0 0 0] [1 0 0 0 0 0 0 0]2: arr|arr1 of: [1 0 0 0 0 0 0 0] [3 0 0 0 0 0 0 0] // 只是修改的那个变化了3: slice|slice1 of: [2] [2]4: slice|slice1 of: [5] [5] // 好奇怪，怎么都更改了呢