be better ,be stronger ,这种是什么用法?

Be strong.be strong. Be strong be better You must be strong . Just be strong Be strong and Be strong,also be a heart strong be a heart strong be better with=be better at? Can be tough,Can be strong. You Must Be Strong 歌词 Hold On Be Strong 歌词 Tomorrow will be better d be a better it could be better. to be a better you will be ( ) better.