如何在Rust中迭代和提取for循环中的值

我是Rust的新手,希望了解借用等概念.我正在尝试使用标准输入创建一个简单的二维数组.代码:

use std::io;

fn main() {
    let mut values = [["0"; 6]; 6]; // 6 * 6 array

    // iterate 6 times for user input
    for i in 0..6 {
        let mut outputs = String::new();
        io::stdin().read_line(&mut outputs).expect(
            "failed to read line",
        );

        // read space separated list 6 numbers. Eg: 5 7 8 4 3 9
        let values_itr = outputs.trim().split(' ');
        let mut j = 0;
        for (_, value) in values_itr.enumerate() {
            values[i][j] = value;
            j += 1;
        }
    }
}

这将无法编译,因为outputs变量生命周期不够长:

error[E0597]: `outputs` does not live long enough
  --> src/main.rs:20:5
   |
14 |         let values_itr = outputs.trim().split(' ');
   |                          ------- borrow occurs here
...
20 |     }
   |     ^ `outputs` dropped here while still borrowed
21 | }
   | - borrowed value needs to live until here