add save function of explanation

ios/OralTrainer.xcodeproj/project.pbxproj

@@ -10,6 +10,7 @@
 		AA0000000000000000000090 /* AuthAPI.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA0000000000000000000091 /* AuthAPI.swift */; };
 		AA00000000000000000000A1 /* UserHistory.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA00000000000000000000A2 /* UserHistory.swift */; };
 		AA00000000000000000000A3 /* TrainingHistoryStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA00000000000000000000A4 /* TrainingHistoryStore.swift */; };
+		AA00000000000000000000B0 /* SentenceExplanationStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA00000000000000000000B1 /* SentenceExplanationStore.swift */; };
 		AA0000000000000000000092 /* AuthView.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA0000000000000000000093 /* AuthView.swift */; };
 		AA0000000000000000000040 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = AA0000000000000000000020 /* Assets.xcassets */; };
 		AA0000000000000000000042 /* OralTrainerApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA0000000000000000000022 /* OralTrainerApp.swift */; };
@@ -41,6 +42,7 @@
 		AA0000000000000000000091 /* AuthAPI.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AuthAPI.swift; sourceTree = "<group>"; };
 		AA00000000000000000000A2 /* UserHistory.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserHistory.swift; sourceTree = "<group>"; };
 		AA00000000000000000000A4 /* TrainingHistoryStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TrainingHistoryStore.swift; sourceTree = "<group>"; };
+		AA00000000000000000000B1 /* SentenceExplanationStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SentenceExplanationStore.swift; sourceTree = "<group>"; };
 		AA0000000000000000000093 /* AuthView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AuthView.swift; sourceTree = "<group>"; };
 		AA000000000000000000000A /* OralTrainer.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = OralTrainer.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		AA000000000000000000001F /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -131,6 +133,7 @@
 				AA000000000000000000002A /* SentenceBoundaryAPI.swift */,
 				AA000000000000000000002B /* ImitationAssessor.swift */,
 				AA00000000000000000000A4 /* TrainingHistoryStore.swift */,
+				AA00000000000000000000B1 /* SentenceExplanationStore.swift */,
 				AA00000000000000000000A2 /* UserHistory.swift */,
 				AA000000000000000000007E /* DubbingCompositor.swift */,
 				AA0000000000000000000081 /* AudioRecorderSession.swift */,
@@ -267,6 +270,7 @@
 				AA0000000000000000000090 /* AuthAPI.swift in Sources */,
 				AA00000000000000000000A1 /* UserHistory.swift in Sources */,
 				AA00000000000000000000A3 /* TrainingHistoryStore.swift in Sources */,
+				AA00000000000000000000B0 /* SentenceExplanationStore.swift in Sources */,
 				AA0000000000000000000092 /* AuthView.swift in Sources */,
 				AA0000000000000000000053 /* TestView.swift in Sources */,
 				AA0000000000000000000054 /* FullscreenPlayerView.swift in Sources */,

ios/OralTrainer.xcodeproj/project.xcworkspace/xcuserdata/liushuming.xcuserdatad/IDEFindNavigatorScopes.plist

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<array/>
+</plist>