Docs: Change a grammar sentence
issue
@@ -51,7 +51,7 @@ Figure 4-1 BoAT Overall Framework
### Interface Layer
#### Overview
-The interface layer is located at the top layer of BoAT and provides IoT applications with access to each blockchain. The interface layer consists of two parts:
+The interface layer is located at the top layer of BoAT and provides IoT applications with the access to each blockchain. The interface layer consists of two parts:
+ Wallet interface
* The wallet interface is the entrance to the BoAT SDK, and different blockchains have a common wallet entrance.
+ Transaction interface
