一个简单的背单词的功能，单词全放在　　　 ”词汇.txt中“，　还有保存退出位置的功能，存放在“position.txt”中，进入后还能选择上次退出外置继续背单词,A simple word back function, the word on the full vocabulary txt ", as well as hold the exit location, stored in the" position.txt "enter can select the last exit the external to continue back word