Add parallel parameter description (#678)

FISCO-BCOS · Nov 11, 2019 · 66305ed · 66305ed
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diff --git a/docs/manual/transaction_parallel.md b/docs/manual/transaction_parallel.md
@@ -126,11 +126,11 @@ contract ParallelOk is ParallelContract // 将ParallelContract 作为基类
 在编写接口前，先确定接口的互斥参数，接口的互斥即是对全局变量的互斥，互斥参数的确定规则为：
 
 - 接口访问了全局mapping，mapping的key是互斥参数
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 - 接口访问了全局数组，数组的下标是互斥参数
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 - 接口访问了简单类型的全局变量，所有简单类型的全局变量共用一个互斥参数，用不同的变量名作为互斥对象
 
+> 例如：合约里有多个简单类型的全局变量，不同接口访问了不同的全局变量。如要将不同接口并行，则需要在修改了全局变量的接口参数中定义一个互斥参数，用来调用时指明使用了哪个全局变量。在调用时，主动给互斥参数传递相应修改的全局变量的“变量名”，用以标明此笔交易的互斥对象。如：`setA(int x)`函数中修改了全局参数`globalA`，则需要将`setA`函数定义为`set(string aflag, int x)`， 在调用时，传入`setA("globalA", 10)`，用变量名`“globalA”`来指明此交易的互斥对象是`globalA`。
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 **确定参数类型和顺序**
 
 确定互斥参数后，根据规则确定参数类型和顺序，规则为：

diff --git a/en/docs/manual/transaction_parallel.md b/en/docs/manual/transaction_parallel.md
@@ -126,11 +126,11 @@ A parallelable contract interface has to meet following conditions:
 Before compiling interface, please confirm the exclusive parameter of interface. The exclusion of interface is the exclusion of global variables. The confirmation of exclusive parameter has following rules:
 
 - the interface accessed global mapping, the key of mapping is the exclusive parameter
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 - the interface accessed global arrays, the subscript of a array is the exclusive parameter
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 - the interface accessed simple type of global variables, all the simple type global variables share one exclusive parameter and use different variable names as the exclusive objects.
 
+> For example: If `setA(int x)`writes `globalA`, we need to declare it as `setA(string aflag, int x)` and call it like `setA("globalA", 10)` by using `globalA` to declare the exclusive object.
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 **Confirm parameter type and sequence**
 
 After the exclusive parameter is confirmed, confirm parameter type and sequence according to following rules: