to start thinking seriously about solving a problem
开始认真思考如何解决问题 (kaishi renzhen sikao jiejue wenti)
"Let’s put on our thinking caps and find a solution."
"让我们戴上思考帽，找到解决方案。" (Rang women daishang sikaomao, zhaodao jiejue fang'an)
having practical intelligence and experience, not just book...
to travel or walk around aimlessly
no longer involved or relevant
To speak honestly and sincerely.
to describe something in an overly optimistic way
to become independent from someone or something
