Update README.md

Author: daizhenyang

README.md

@@ -5,7 +5,8 @@ This responsibility is a practice area for leetcode problems.
 It not only focus on solving but also different solutions.
 
 Furthermore, this responsibility is mainly for different implemention of problem's on leetcode.
-For example, traversing a tree
+
+About different between solution and implemention, For example, traversing a tree
 
 1)DFS and BFS are considered as TWO different solutions
 
@@ -14,7 +15,7 @@ For example, traversing a tree
 As we know, when interview, for a problem, the requirement are higher than it in programming contests, we only
 , in programming contests, we only care the algorithm complexity and correctness, but when in interview, the interviewer
 often ask other question, especially about the different implemention and solution. For example, he may ask you whether you can
-implement without define this varable, change recursion to stack, traverse without queue, do not use vector, etc.
+implement without define this auxiliary varable, change recursion to stack, traverse without queue, do not use vector, etc.
 
 And if you practice leetcode just like other online judges, just submit and get Accepted, then throw it away, it's hard
 to prepare these questions. Actually, different from complexity and correctness,