" Silence, silence." All the air of the fourteenth floor was sibilant with the categorical imperative.

“肃静，肃静”，这断然命令让空气里充满了肃、肃、肃嘶沙音。

In the silence Harry imagined he could hear the snake hissing slightly as it coiled and uncoiled--or was it Voldemort's sibilant sigh lingering on the air?

一片寂静中，哈利觉得他可以听到那条正盘旋伸蛇轻微嘶嘶声，或者是伏地魔那咝咝叹息声还停留在空气里？

The last part of his speech was lost in a faint sibilant buzz that went through the gathering, an angry beelike buzz. There were indignation and disappointment in the sound.

这声音里既包含愤怒，也包含失望。