無理難題を押し伝て申し訳ないです。でも、もっといろいろな単語を勉強したいのです。
私が使う単語は簡単すぎて、味が出ないと思っています。いろいろな単語を知って、
英語力を向上させたいと思っています。
I know it's too much a demand, but I really want to master a much wider range of vocabulary.
I'm aware that my vocabulary level is so elementary that my sentences become a bit dull. That's why I would like to improve my English skill through learning various kinds of words.