A qualifying or amplifying word, phrase, or sentence inserted within written matter in such a way as to be independent of the surrounding grammatical structure. 插入成份，插入詞在書寫中插入的與上下文的語法結構沒有關係的限定或補充的詞、短語或句子
Now that you are a college student, you should learn to be independent of your parents' help. 既然你已是個大學生了，就應當學著獨立，不靠父母的幫助。
You should learn to be independent of your parents. 你應該學習不要依賴父母。
