Radio spectrum
[电] 无线电频段
🧩 词语组成解析
🗣️ 情景例句
These files are highly confidential, please store them properly.
这些文件是高度机密的，请妥善保存。
Whatever he does, don't say a word.
不管他做什么，你都不要讲话。
When a plane from London arrived at Sydney airport, workers began to unload a number of wooden boxes which contained clothing.
当一架来自伦敦的飞机抵达悉尼机场时，工人们开始卸下装有服装的一批木箱。