Most likely, soon after you’ve started your Rust journey, you ran into this scenario where you tried to work with string types (or should I say, you thought you were?), and the compiler refused to compile your code because of something that looks like a string, actually isn’t a string.
当你开始Rust的学习之旅后，很可能遇到需要使用字符串的场景，但是编译器却无法让你的代码通过编译，因为有一部分代码，看起来像字符串，事实上却又不是。
For example, let’s take a look at this super simple function greet(name: String) which takes something of type String and prints it to screen using the println!() macro:
例如，让我们看看下面这个简单的函数greet(name: String)，这个函数接收一个String类型的参数，然后使用println!()这个宏将它打印到屏幕上: