Golang报错mixture of field:value and value initializers

package main

import (
    "fmt"
)

type Person struct {
    Name string
    Age  int
    Sex  string
}

type Student struct {
    Person
    Id    string
    Grade string
}


func main() {
    s1 := Student{Person: Person{Name: "张三",Age: 13,Sex: "男"},Id: "13321",Grade: "三年级"}
    fmt.Printf("%+vn",s1)

    s2 := Student{Person{"张三",13,"男"},"12312","三年级"}
    fmt.Println(s2)

    s3 := Student{Person{Name: "张三",Grade: "三年级"} //报错 mixture of field:value and value initializers（字段的混合：值和值初始化器）
    fmt.Println(s3)
}