Despite her preparation, a noticeable tremor made her voice shake throughout the presentation.

voice的意思是"声音"，指人说话或唱歌时发出的声响。 shake是动词，意思是"颤抖、抖动"，描述不自主的快速震动动作。 voice shake指声音不自主地颤抖，通常是由于紧张、寒冷或情绪激动导致的。