https://kaisery.github.io/trpl-zh-cn/ch10-00-generics.html

在示例 10-3 的程序中将寻找最大值的代码提取到了一个叫做 largest 的函数中。接着我们调用了示例 10-2 中寻找两个列表中最大值的函数。之后也可以将该函数用于任何可能的 i32 值的列表。

https://doc.rust-lang.org/book/ch10-00-generics.html

In Listing 10-3, we extract the code that finds the largest number into a function named largest. Then we call the function to find the largest number in the two lists from Listing 10-2. We could also use the function on any other list of i32 values we might have in the future.