n. the repetition of a sound resulting from reflection of the sound waves
n. (Greek mythology) a nymph who was spurned by Narcissus and pined away until only her voice remained
n. a reply that repeats what has just been said
n. a reflected television or radio or radar beam
n. 回声, 回音, 回波
vi. 发回声, 随声附和
vt. 摹仿, 重复, 反射
[计] 回显; DOS批处理命令:控制MS-DOS命令是否在屏幕上显示
1. The mountains created an echo when I shouted.
当我大喊时，山脉产生了回声。
2. She heard an echo of her voice in the empty room.
她在空房间里听到了自己声音的回声。
3. The teacher asked the students to echo the new words after her.
老师让学生们在她之后重复新单词。