Thermionic tube
[电] 热离子管
🧩 词语组成解析
a. 热离子的\\n[电] 热离
🗣️ 情景例句
They'll just make him sad.
那些只会让他悲伤。
Fill it up with premium, please.
请加满高级汽油。
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，