And the first thing you do is ask is it an instance of some problem that other people have already solved?

而且你以前从没碰过这个问题,你首先要做的一件事就是问问自己,这是不是一个别人已经解决了的问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

Dr Cao's group first solved the problem of using Anderson localisation to create a true laser last year, but the resulting devices were a millimetre across.

ECONOMIST: Microlasers

The latest breakthrough, according to the paper's authors, is the first time that online gamers have solved a longstanding scientific problem.

BBC: Online game Foldit helps anti-Aids drug quest