Vacuum tubes
[医] 真空管
🧩 词语组成解析
n. 管子, 导管；管状虫；伦敦地铁（tube的复数）
🗣️ 情景例句
Grandpa taught me.
爷爷教我的。
Throw away the apple because of the core.
因噎废食。
I know. I can help him with most of his subjects.
我知道。我可以帮助他学习绝大多数科目。