zh-Hans: Translation of hello-world.md (#694)

* zh-hans translation of hello-world.md

---------

Co-authored-by: wnghl <wnghilin@gmail.com>

po/zh-Hans.po

@@ -2002,13 +2002,14 @@ msgstr ""
 
 #: src/hello-world.md:1
 msgid "# Hello World!"
-msgstr ""
+msgstr "# Hello World!"
 
 #: src/hello-world.md:3
 msgid ""
 "Let us jump into the simplest possible Rust program, a classic Hello World\n"
 "program:"
 msgstr ""
+"让我们进入最简单的 Rust 程序，一个经典的 Hello World 程序："
 
 #: src/hello-world.md:6
 msgid ""
@@ -2018,10 +2019,16 @@ msgid ""
 "}\n"
 "```"
 msgstr ""
+"```rust,editable\n"
+"fn main() {\n"
+"    println!(\"Hello 🌍!\");\n"
+"}\n"
+"```"
+
 
 #: src/hello-world.md:12
 msgid "What you see:"
-msgstr ""
+msgstr "你看到的："
 
 #: src/hello-world.md:14
 msgid ""
@@ -2031,6 +2038,11 @@ msgid ""
 "* Rust has hygienic macros, `println!` is an example of this.\n"
 "* Rust strings are UTF-8 encoded and can contain any Unicode character."
 msgstr ""
+"* 函数以 `fn` 开头。\n" 
+"* 像 C 和 C++ 一样，块由花括号分隔。\n" 
+"* main 函数是程序的入口。\n" 
+"* Rust 有卫生宏 (hygienic macros)，`println!` 就是一个例子。\n" 
+"* Rust 字符串是 UTF-8 编码的，可以包含任何 Unicode 字符。"
 
 #: src/hello-world.md:22
 msgid ""
@@ -2038,7 +2050,8 @@ msgid ""
 "see\n"
 "a ton of it over the next four days so we start small with something "
 "familiar."
-msgstr ""
+msgstr "这张幻灯片试图让学生们熟悉 Rust 代码。在接下来的四天里，他们会看到很多 Rust 代码, 所以我们从一些熟悉的东西开始。"
+
 
 #: src/hello-world.md:27
 msgid ""
@@ -2059,6 +2072,11 @@ msgid ""
 "  [partially hygienic](https://veykril.github.io/tlborm/decl-macros/minutiae/"
 "hygiene.html)."
 msgstr ""
+"* Rust 非常像 C/C++/Java 等其他传统语言。它是指令式语言（而非函数式），而且除非绝对必要，它不会尝试重新发明新的概念。\n"
+"* Rust 是一种现代编程语言，它完全支持 Unicode 等特性。\n"
+"* 在需要处理可变数量的参数的情况下，Rust 使用宏（没有函数[重载](basic-syntax/functions-interlude.md)）。\n"
+"* 宏是“卫生的”意味着它们不会意外地捕获它们所在作用域中的标识符。Rust 的宏实际上只是[部分卫生](https://veykril.github.io/tlborm/decl-macros/minutiae/hygiene.html)" 
+
 
 #: src/hello-world/small-example.md:1
 msgid "# Small Example"