别的... is an adjective. It means other.... This word is always followed by some nouns. For example, 别的事情（other things），别的人（other people） 主要 means mostly/main. it is a little bit similar with important. For example, 主要内容（main point），主要目标（main objective/goal） 我们现在的主要目标就是打败对手，别的任何事情都不重要。 Now our main goal is to beat the opponent, everything else is/other things are not important. Cici, I hope this will help you. Actually, you can explain your questions in more details. I think it is easier to understand new words by using them in sentences, instead of just studying the words.

别的==other 主要=major

别的。meaning is other.like :other things.主要:meaning is first.And Chinese is easy.Don't worry.you can chat with Chinese.Yes.you can.