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Update 10-savinggasview.md #595

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Expand Up @@ -206,7 +206,7 @@ material:

稍后我们将介绍如何在自己的节点上设置 web3.js。但现在，你关键是要记住，在所能只读的函数上标记上表示“只读”的“`external view` 声明，就能为你的玩家减少在 DApp 中 gas 用量。

>注意：如果一个 `view` 函数在另一个函数的内部被调用，而调用函数与 `view` 函数的不属于同一个合约，也会产生调用成本。这是因为如果主调函数在以太坊创建了一个事务，它仍然需要逐个节点去验证。所以标记为 `view` 的函数只有在外部调用时才是免费的。
>注意：如果一个 `view` 函数被另一个相同合约的函数调用，调用者函数不是一个 `view` 函数，被调用函数也会产生调用成本。这是因为如果调用者函数在以太坊创建了一个事务，它仍然需要逐个节点去验证。所以标记为 `view` 的函数只有在外部调用时才是免费的。


## 实战演习
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