Vacuum tube detector
[电] 真空管检波器
🧩 词语组成解析
🗣️ 情景例句
There's your sleeping bag.
这是你们的睡袋。
No man can do two things at once.
心无二用。
I like spring and summer.The days are long and the night are short.The sun rises early and sets late.
我最喜欢春季和夏季。因为此时白天长而夜晚短，太阳升得早而落得迟。