diff --git a/docs/solidity-102/17_Library/readme.md b/docs/solidity-102/17_Library/readme.md
index eb07be78..bbd05739 100755
--- a/docs/solidity-102/17_Library/readme.md
+++ b/docs/solidity-102/17_Library/readme.md
@@ -105,7 +105,7 @@ library Strings {
}
```
-他主要包含两个函数,`toString()`将`uint256`转为`string`,`toHexString()`将`uint256`转换为`16进制`,在转换为`string`。
+他主要包含两个函数,`toString()`将`uint256`转为`string`,`toHexString()`将`uint256`转换为`16进制`,再转换为`string`。
### 如何使用库合约
@@ -146,4 +146,4 @@ library Strings {
3. [Create2](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/4a9cc8b4918ef3736229a5cc5a310bdc17bf759f/contracts/utils/Create2.sol):更安全的使用`Create2 EVM opcode`
4. [Arrays](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/4a9cc8b4918ef3736229a5cc5a310bdc17bf759f/contracts/utils/Arrays.sol):跟数组相关的库合约
-
\ No newline at end of file
+