Noun:

1. the repetition of a sound resulting from reflection of the sound waves;

   "she could hear echoes of her own footsteps"
   

2. a remote or indirect consequence of some action;

   "his declaration had unforeseen repercussions"
   "reverberations of the market crash were felt years later"
   

falloutn.原子尘的降下；辐射尘；余波；附带结果

janglev.发出刺耳声；刺激(神经)；争吵n.刺耳的声音

consequencen.结果；后果；重要性；影响

thundern.雷；雷声v.打雷；轰隆地响；大声喊出

echovi.发出回声；回响vt.重复；模仿；附和n.回声；重复；共鸣Echo.n.[希神]山林女神（失恋于那喀索斯；其哀声留于山间成为回声）

soundn.声音；嘈杂声；音乐风格；曲调；印象；感觉；海峡；鱼鳔；探针v.听起来；感觉起来；发出声音；发音；探测深度；探询adj.有效的；合理的；可靠的；全面的；健康的；完好的；酣睡的；严厉的adv.酣畅地

noisen.噪声；喧闹声；响声vt.谣传vi.大声说话；发出噪音

boomn.繁荣；兴旺；激增；低沉声n.帆杠；吊杆；支臂；尾桁；水栅vi.急速增长；发出低沉声vt.使兴旺；促进

repercussionn.弹回；反响；后果；反射

replicationn.复制；回答；答辩；反叠

sound reflection声反射

1. The reflected sound causes reverberation or echo.
   反射的声浪，会造成混响或回音。