diff --git a/Booting/linux-bootstrap-2md.md b/Booting/linux-bootstrap-2md.md
index f21a289..27286e3 100644
--- a/Booting/linux-bootstrap-2md.md
+++ b/Booting/linux-bootstrap-2md.md
@@ -378,10 +378,10 @@ if (cpu_level < req_level) {
 
 `check_cpu`方法做了大量的检测和设置工作，下面就简单介绍一些：1）检查cpu标志，如果cpu是64位cpu，那么就设置[long mode](http://en.wikipedia.org/wiki/Long_mode), 2) 检查CPU的制造商，根据制造商的不同，设置不同的CPU选项。比如对于AMD出厂的cpu，如果不支持SSE+SSE2，那么就禁止这些选项。
 
-Memory detection
+内存侦测
 --------------------------------------------------------------------------------
 
-The next step is memory detection by the `detect_memory` function. `detect_memory` basically provides a map of available RAM to the cpu. It uses different programming interfaces for memory detection like `0xe820`, `0xe801` and `0x88`. We will see only the implementation of **0xE820** here.
+接下来，内核调用`detect_memory`方法进行内存侦测，以得到系统当前内存的使用分布。It uses different programming interfaces for memory detection like `0xe820`, `0xe801` and `0x88`. We will see only the implementation of **0xE820** here.
 
 Let's look into the `detect_memory_e820` implementation from the [arch/x86/boot/memory.c](https://github.com/torvalds/linux/blob/master/arch/x86/boot/memory.c) source file. First of all, the `detect_memory_e820` function initializes the `biosregs` structure as we saw above and fills registers with special values for the `0xe820` call: