Active sonar
[电] 有效声纳
🧩 词语组成解析
active
['æktiv]
adj. 积极的，活跃的，有生气的;迅速的，敏捷的;有效的，起作用的;
n. [语法]主动语态;积极分子，活跃的人;
sonar
['səunɑ:]
n. 声呐装置，声呐系统;声呐兵;
🗣️ 情景例句
I'd like to buy some stamps for this letter.
我想买这封信的邮票。
We are sure to defeat them.
我们一定会打败他们。
He is finding his new work far more exciting.
他发觉自己的新工作令人兴奋得多。