By radio
用无线电,通过广播
🧩 词语组成解析
by
[baɪ]
prep. 在…旁边;表示方式;由于;经过;
adv. 经过;表示保留或保存时用;短暂拜访;
🗣️ 情景例句
No advertising material.
谢绝广告。
I tried to call you, but the line was busy.
我试着给你打电话，但老占线。
That fits the puzzle! It must be him!
这符合谜底，肯定是他。