Since hourglasses and sundials , people have sought out ways to tell and manage time .

由于沙漏和日晷，人们找办法告诉和管理时间。

At first , gryffindors passing the giant hourglasses that recorded the house points the next day thought there 'd been a mistake . How could they suddenly have a hundred and fifty points fewer than yesterday ?

一开始，格林芬顿队的学生们经过那块记载着上一天的竞赛分数的大积分榜的时候，还以为它出错了：他们怎么可能忽然间比昨天少了整整150分呢？