If you want to do world history, start by memorizing! When reading a long English sentence, do not solve it unless you understand the meaning of the word If you don't know the words, you can't grasp the flow of world history. First of all, please learn the terms of world history with this app. Try to memorize everything you don't understand. Learn the words of world history first, then read the textbooks and learn the flow. Then the blood of world history will begin to flow in your body.