Vacuum keying
[电] 真空按键
🧩 词语组成解析
[计] 键控
🗣️ 情景例句
I know you are.
我知道你是。
If you sell the cow, you sell her milk too.
蚀了本也输了利。
it must be known to any kind of radio astronomer in the universe.
这个频率是宇宙中任何射电天文学家都应该熟悉的。