Update ch03-02-data-types.md

src/ch03-02-data-types.md

@@ -58,11 +58,11 @@ error[E0282]: type annotations needed
 
 | 数字字面值        | 例子          |
 |------------------|---------------|
-| Decimal          | `98_222`      |
-| Hex              | `0xff`        |
-| Octal            | `0o77`        |
-| Binary           | `0b1111_0000` |
-| Byte (`u8` only) | `b'A'`        |
+| Decimal (十进制)         | `98_222`      |
+| Hex (十六进制)             | `0xff`        |
+| Octal (八进制)           | `0o77`        |
+| Binary (二进制)          | `0b1111_0000` |
+| Byte (单字节字符)(仅限于`u8`) | `b'A'`        |
 
 那么该使用哪种类型的数字呢？如果拿不定主意，Rust 的默认类型通常就很好，数字类型默认是 `i32`：它通常是最快的，甚至在 64 位系统上也是。`isize` 或 `usize` 主要作为某些集合的索引。
 
@@ -293,4 +293,4 @@ ch02-00-guessing-game-tutorial.html#comparing-the-guess-to-the-secret-number
 [control-flow]: ch03-05-control-flow.html#control-flow
 [strings]: ch08-02-strings.html#storing-utf-8-encoded-text-with-strings
 [unrecoverable-errors-with-panic]: ch09-01-unrecoverable-errors-with-panic.html
-[wrapping]: ../std/num/struct.Wrapping.html
+[wrapping]: ../std/num/struct.Wrapping.html