Echo technique
[电] 回双工技术
🧩 词语组成解析
echo
['ɛko]
n. 回声，共鸣;（言语、作风、思想等的）重复;重复者;[无线电]回波;
vt. 重复，效仿;随声附和;类似;发射（声音等）;
vi. 被重复;产生回响;充满回声;
echo-, ech- 表示”声音 ,噪音”;特备是”回声”;”重复,模仿”
🗣️ 情景例句
I apologize.
我道歉。
Try (your friend) before you trust him.
朋友要经考验，才能取得信任。
He told him he had better return it or he would call the police.
告诉他最好把羊交还，否则就去叫警察。