Vacuum bulb
[电] 真空灯泡
🧩 词语组成解析
bulb
[bʌlb]
n. 球茎，块茎植物;电灯泡;[解剖学]肿块;
🗣️ 情景例句
Mr. Malcolm Stewart, and it looks like a personal letter.
Malcolm Stewart先生收 ，而且看来是一封私人信件。
Exactly.
完全正确。
What was the population of the less developed countries in 1950?
1950年不太发达国家的人口是多少？