update

Author: ChengOrangeJu

FAQ_nebulas_development_en.md

@@ -2,24 +2,30 @@
 ## Quick start tutorial:
 
 #### How to Compile and Install Nebulas
-> A: Follow step by step introduction on
-> https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2001%20Installation.md
+> A: Follow this instruction step by step on [this page](https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2001%20Installation.md)
 
 #### How to Send Transactions on Nebulas
-> https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2002%20Transaction.md
-> You can also find a video lesson: https://www.youtube.com/watch?v=-44tVVR6ETo&list=PLFipfN18ZQwsW1_dge4w7dfsVNdNZZ37R&index=1
+> Nebulas provides three methods to send transactions：
+>(1) Sign & Send
+>(2) Send with Passphrase
+>(3) Unlock & Send
+
+> [Detailed introduction](https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2002%20Transaction.md)
 
 #### How to Write and run a smart contract
-> Through this tutorial we will learn how to write, deploy, and execute smart contracts in Nebulas.
-> https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2003%20Smart%20Contracts%20JavaScript.md
+> Through this [tutorial](https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2003%20Smart%20Contracts%20JavaScript.md)
+ we will learn how to write, deploy, and execute smart contracts in Nebulas.
 
 #### How to use Smart Contract Storage
-> https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2004%20Smart%20Contract%20Storage.md
+  
+> We introduce in [detail](https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2004%20Smart%20Contract%20Storage.md)
+ the storage of the smart contract. Nebulas smart contracts provide on-chain data storage capabilities. Similar to the traditional key-value storage system (eg: redis), smart contracts can be stored on the Nebulas by paying with (gas).
+
 
 #### How to Interacting with Nebulas by RPC API
 > Nebulas chain node can be accessed and controlled remotely through RPC. Nebulas chain provides a series of APIs to get node information, account balances, send transactions and deploy calls to smart contracts.
 > The remote access to the Nebulas chain is implemented by gRPC, and also could be accessed by HTTP via the proxy (grpc-gateway). HTTP access is a interface implemented by RESTful, with the same parameters as the gRPC interface.
-> https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2005%20Interacting%20with%20Nebulas%20by%20RPC%20API.md
+> [See detail](https://github.com/nebulasio/wiki/blob/master/tutorials/%5BEnglish%5D%20Nebulas%20101%20-%2005%20Interacting%20with%20Nebulas%20by%20RPC%20API.md)
 
 
 ## Advanced questions