刚看到有几个人昨天在谈论著名的兰利问题(http://bbs.wenxuecity.com/znjy/1600092.html)。让我张贴兰利问题及其解决方案在这里供大家参考(http://agutie.homestead.com/files/LangleyProblem.html)。
The famous Langley problem is a type of problem called "Adventitious Angles" problem because it is a matter of chance that we will be able to solve this problem. It appears to be an easy problem, but it is deceivingly difficult.