Selective emission
[电] 选择性发射
🧩 词语组成解析
selective
[si'lektiv]
adj. 精心选择的;选择的，不普遍的;淘汰的;
🗣️ 情景例句
Will you be so kind as to help me out of the difficulty?
帮助我克服困难，好吗？
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
Yes, sir?
什么事，先生。