Filch seemed to be in an extremely good mood; he hummed creakily under his breath as they climbed the marble staircase.

费尔奇心情似乎特别好。他们走上大理石楼梯时，他断断续续地小声哼着歌。

She pushed up the sash—it went up stiffly and creakily, as if it hadn't been opened for a long time, which was the case; and it stuck so tight that nothing was needed to hold it up.

她推起窗框——它僵硬地向上推，咯咯作响，好像很久没有打开过，就是这样；它卡得很紧，不需要任何东西来支撑它。