请问C++中流提取运算符”>>“实现文本文件读取的作用机制是怎样的呢？为什么三次调用">>"，文本文件会连续读取呢？

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream fin("D:\\test1.txt");      // 创建输入流类对象并和磁盘文件绑定
    if(!fin) {
        cout << "can not open the file" << endl;
        exit(1);
    }
    char one[64], two[64], three[64];
    fin >> one ;                           //三次提取文本文件
    fin >> two ;
    fin >> three;
    cout << one <<endl << two << endl << three <<endl;
    fin.close();
    return 0;
}

文本文件按如下方式创建

#include <iostream>
#include<fstream>
#include<iomanip>
using namespace std;

int main()
{
    ofstream fout("D:\\test1.txt");
    if(!fout) {
        cout << "can not open the file" << endl;
        exit(1);
    }
    fout << "The contents of the file :" << endl;
    fout << "opp is not difficult to learn," << endl;
    fout << "as long as have this book." << endl;
    fout.close();
    return 0;
}

文本文件内容如下：
The contents of the file :
opp is not difficult to learn,
as long as have this book.

请问为什么输出结果不是三个 The 而是The contents of 呢？