indirect echo

例句：

1. 1. The scientist's theory was a direct echo of the previous research.
   科学家的理论直接回应了之前的研究成果。
2. 2.The decision to invest in renewable energy is an indirect echo of our commitment to sustainability.
   投资可再生能源的决定是我们对可持续性承诺的间接体现。
3. 3. The feedback from the audience was an indirect echo of their expectations for the performance.
   观众的反馈反映了他们对演出的期望，这可以视为一种间接回声。