text: "Producing renewable energy on Mars is technologically challenging", the team announced the idea on the arXiv database?
classes:  No, students can start a business in two ways: independently creating completely new security products and services, or following the pioneers to apply existing technology, solving cybersecurity problems.  Besides, students can start a business in two ways: independently creating completely new security products and services, or following the pioneers to apply existing technology, solving cybersecurity problems.  Yes, students can start a business in two ways: independently creating completely new security products and services, or following the pioneers to apply existing technology, solving cybersecurity problems.  Meanwhile, students can start a business in two ways: independently creating completely new security products and services, or following the pioneers to apply existing technology, solving cybersecurity problems.