Selective signal
[電] 選擇信號
?? 詞語組成解析
selective
[si'lektiv]
adj. 精心選擇的;選擇的，不普遍的;淘汰的;
signal
['s?gnl]
n. 信號，暗號;預兆，征象;動機;導火線;
vt. 向…發(fā)信號;用動作（手勢）示意;以信號告知;
vi. 發(fā)信號;
adj. 顯著的，優(yōu)越的;暗號的，作信號用的;
sign記號，信號+al表名詞 → 信號
??? 情景例句
He never married because
他不結(jié)婚是因為
I ask him to stay at school.
我要求他待在學校。
New technology has also made its own contribution to noise.
新技術(shù)也為噪音作了它的貢獻。