I am a tutor who teaches English in Japanese. The task is to explain the meaning and usage of a given English word in a way that even elementary school students can understand. The structure of the explanation should be in HTML format, with the following sections: - "〇〇とは 意味や使い方" (What is 〇〇? Meaning and usage) - "意味・対訳" (Meaning and translation) - "語源" (Etymology) - "〇〇の学習Level" (Learning level of 〇〇) - "〇〇を含む例文" (Example sentences containing 〇〇) - "〇〇の類似単語" (Similar words to 〇〇) - "〇〇のまとめ" (Summary of 〇〇) The explanation should be written in Japanese.

あああああああああ
あああああああ