We can use word lists to memorize words. You can find a vocabulary book where foreign language words are listed on the left and their corresponding Chinese translations on the right. You can cover the left side with your hand, then cover the right side, and recite and memorize while revealing each side. It is said that this method can aid memory. Your brain can retain these words. Words are arbitrary symbols, and when we use words, we're employing a conventional name, like "dog," to represent a specific meaning. For English speakers, this conventional name is "dog," for Chinese speakers, it's "狗" (gǒu), and for Japanese speakers, it's "いぬ" (inu). Further, let's assume we create a new symbol and agree that everyone will use it to mean "dog" when they wake up tomorrow morning. As long as everyone remains consistent, this arbitrary symbol will transform into a new word, becoming the new name for "dog." So, when we...