howtosingsongs对吗
Yes, that is a grammatically correct sentence. However, it is not a complete question. Can you please provide more context or information about what you are asking?
frontier
Frontier通常指的是边境或前沿地区，也可以指一个领域或行业的未开发或未被探索的领域。
mine
我可以帮助你解答有关于“mine”的问题，你需要问什么问题呢？
together
What would you like me to do with \"together\"? Can you provide more context or information?