Passive sonar
[电] 无源声纳
🧩 词语组成解析
sonar
['səunɑ:]
n. 声呐装置，声呐系统;声呐兵;
🗣️ 情景例句
How often do you go running?
你多久跑步锻炼一次？
One way or a round trip ticket?
单程票还是双程票呢？
There are some in the cupboard.
碗橱里有几只。