本文描写作者应邀为老同学解决一起与学生的物理题“纠纷”。学生不同意单一的答案，觉得自己应该得到高分而不是零分，于是和老师协议邀请第三方公正的我解决问题。

Hints：

有引号

'g'

barometer

第三句的it is会听成it·s的。大家注意是it is就好。英语很多it is 听不出来的。

"Yes," said the student. "There is a very basic measurement method that people will like, because it is so simple and direct. In this method, you take the barometer and walk up the stairs. As you climb the stairs, you mark off the length of the barometer along the wall. You then count the number of marks, and this will give you the height of the building in barometer units. The only trouble with this method is that it doesn't require much knowledge of physics. "Of course, if you prefer a more sophisticated method, a method that will really show some knowledge of physics, you can tie the barometer to the end of a rope, swing it as a pendulum and determine the value of 'g' at the street level and at the top of the building. From the difference between the two values of 'g' the height of the building can, in principle, be worked out. "
“有，”那学生回应道。 “有个最简单的测量方法，非常直接，人们比较喜欢用的一个方法。运用这个方法，你需要带着气压计走上楼去。当你在上楼梯的时候，将气压计靠在墙上所度量的长度做上一个个标记，接着你统计下有多少个标记，这样你就可以通过用气压计作为单位的方式计算出楼房的高度了。唯一的不足在于这个方法没有运用到物理知识。 “当然，如果你想选择一个更为复杂的方法，一个真真正正体现物理知识的方法。你可以将气压计绑在绳子的末端，像个摆锤一样摆动气压计来计算在水平面上的重力加速度和在楼顶的重力加速度。原则上，从二者的区别中我们可以就计算出楼房的高度。