复数：sounding boards
1.共鸣[共振]板
2.(设在舞台上方或后方增加音响洪亮度的)回声结构
3.用来扩散舆论的人或物,“传声筒”
4.(用来测验外界对某种意见的反应的)反应灵敏的人
1.someone who listens to your ideas and opinions and tells you whether they think they are good or not
2.a large board placed over or behind someone who is speaking in public, so that people can hear them more easily
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