当她试图道歉时，她的声音颤抖了。

Her ___voice ___shook as she tried to apologize.

当他站起来发言时，他的声音在颤抖。

When he stood to give his speech, his ___voice was ___shaking.

尽管做了准备，一阵明显的颤抖让她的声音在整个演讲过程中都颤巍巍的。

Despite her preparation, a noticeable tremor made her ___voice ___shake throughout the presentation.