I primarily use English-English Dictionary to learn new words and I can learn almost every elemantary and intermediate word. But the English explanation of advanced words is sometimes difficult to me

(Don't misunderstand. I am not criticizing you. I think this arrangement of the Vocabulary List is very good. I only want to express my English is poor)

Welp... I could not understand some words in advanced vocabulary even in Chinese... Maybe that's beacuse lots of these words are terminologies related to this topic...