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
A credit card is very useful when you go traveling.
当然旅游的时候，信用卡很有用。
You can't count on Tom being punctual.
你不要指望汤姆会守时。
'Where have you been hiding?' she asked impatiently.
“你躲到哪儿去了？”她不耐烦地问，