Electron mirror
[电] 二次发射极
🧩 词语组成解析
electron
[i'lektrɔn]
n. 电子;
🗣️ 情景例句
The weather during our holiday was perfect.
我们度假时天气好极了。
Nothing is impossible to a willing heart.
心之所愿，无事不成。
international standards of water treatment are usually followed at bottling plants.
装瓶厂通常遵循国际水处理的标准。