Black signal
[电] 黑讯号
🧩 词语组成解析
black
[blæk]
adj. 黑（色）的;黑色人种的;黑暗的;不加牛奶的;
n. 黑色;黑人;黑颜料;黑暗;
v. 使变黑;抵制;拒绝;使变黑暗;
signal
['sɪgnl]
n. 信号，暗号;预兆，征象;动机;导火线;
vt. 向…发信号;用动作（手势）示意;以信号告知;
vi. 发信号;
adj. 显著的，优越的;暗号的，作信号用的;
sign记号，信号+al表名词 → 信号
🗣️ 情景例句
He had a great capacity for learning.
他的学习能力很强。
Edward had heard of the famous singer from Europe.
爱德华曾听说过欧洲出身的著名歌星的事。
Right from the start there was trouble with the Hubble.
从最开始哈勃望远镜就有问题。