Fix additional typos and grammatical errors

en/eBook/02.3.md

@@ -187,7 +187,7 @@ Use the `func` keyword to define a function.
     	return value1, value2
 	}
 	
-We extrapolate the following information from the example above.
+We can extrapolate the following information from the example above.
 
 - Use keyword `func` to define a function `funcName`.
 - Functions have zero, one or more than one arguments. The argument type comes after the argument name and arguments are separated by `,`.
@@ -273,7 +273,7 @@ Go supports variable arguments, which means you can give an uncertain numbers of
 
 When we pass an argument to the function that was called, that function actually gets the copy of our variables so any change will not affect to the original variable.
 
-Let's see one example to prove what i'm saying.
+Let's see one example in order to prove what i'm saying.
 
 	package main
 	import "fmt"