Nevermind means "Forget about the last thing recently talked about." Just is an adverb that shortens your tone with someone, sometimes used in anger, or frustration.... Subscribe refers to when you pay for a magazine. You pay a one year free and they send you one magazine every month. Also, you can subscribe to cable tv, or a certain internet service, as well as magazines.

nevermind,just subscribe! 翻成通俗点的中文就是“不要犹豫了，快来订购吧！”

Depends on the context..... so a clear example... forget about your question, and just subscribe to my youtube channel? http://youtube.com/bleatzy