This is the 7144th most frequent Chinese word.
種種
"種種" means "various" or "all kinds of."
種種 is used to indicate various difficulties.
他经历了種種困难。
He has gone through various difficulties.
種種 is used to describe diverse kinds of knowledge
我們从书中学到了种种知識。
We have learned various knowledge from the book.
種種 is used to reflect different types of issues.