第一步：将气压计（或可叫成晴雨表）带到楼顶,并将身体倾向屋顶的边缘.
第二步：让气压计落下,用一个记秒表（或可叫成停表）来计时它下落的时长
第三步：将气压计降低到街道表面,然后把它拉起来.
1.Take the barometer to the top of the building and lean ove
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