Merge pull request #924 from geoffs3310/patch-1

Update English version of TRON Protocol document.md

Author: HaoqiZhao

English version of TRON Protocol document.md

@@ -4,7 +4,7 @@
 ## The protocol of TRON is defined by Google Protobuf and contains a range of layers, from account, block to transfer.
 
 + There are 3 types of account—basic account, asset release account and contract account, and attributes included in each account are name, types, address, balance and related asset.
-+ A basic account is able to apply to be a validation node, which has serval parameters, including extra attributes, public key, URL, voting statistics, history performance, etc.
++ A basic account is able to apply to be a validation node, which has several parameters, including extra attributes, public key, URL, voting statistics, history performance, etc.
 
      There are three different `Account types`: `Normal`, `AssetIssue`, `Contract`.