无线电

• ピンイン: wú xiàn diàn
• 漢字の分解: 无线 = wireless; 电 = 日 + 乚 (sun with a curved hook — electricity, lightning, electromagnetic energy)

意味

無線通信（ラジオ）；無線電

Encompasses broadcast radio, military communications, aviation radio, amateur radio (业余无线电), and radar. 无线电 is the formal technical term; 收音机 refers specifically to a radio receiver. Used in scientific, historical, and military contexts.

例文

1. 早期的无线电通信技术极大地改变了人类传递信息的方式。
2. 飞行员通过无线电与地面塔台保持实时通话，确保飞行安全。
3. 他年轻时对无线电技术充满热情，自己动手组装了第一台收音机。

使い方ガイド

場面: technology, aviation, military, history, communications

トーン: neutral

正しい言い方

• 二战期间，无线电通信在军事行动中发挥了决定性作用——盟军通过破译敌方无线电密码获取了大量关键情报，这在相当程度上加速了战争的终结。(During the Second World War, radio communication played a decisive role in military operations — the Allied forces obtained vast amounts of critical intelligence by deciphering enemy radio codes, which considerably accelerated the end of the war.)
• 全球有许多业余无线电爱好者，他们在灾害通信中常是恢复联络的第一批力量。(There are many amateur radio enthusiasts around the world, and in disaster communications they are often among the first to restore contact.)

避ける言い方

• 无线电 when referring to a radio set or receiver in everyday conversation — use 收音机 for a radio device; 无线电 refers to the technology or the electromagnetic waves themselves, not the physical appliance

起源と歴史

无线 (wireless) + 电 (electricity, electromagnetic) — wireless electromagnetic signal technology

文化的背景

世代: All ages

社会的背景: Universal