Active infrared detection
[电] 有效红外线检波
🧩 词语组成解析
active
['æktiv]
adj. 积极的，活跃的，有生气的;迅速的，敏捷的;有效的，起作用的;
n. [语法]主动语态;积极分子，活跃的人;
infrared
['infrə'red]
adj. <物>红外线的;
n. 红外线;
🗣️ 情景例句
How long?
多久？
A common danger causes common action.
同仇敌忾。
He could make out three men in a basket under it and one of them was holding a pair of binoculars.
他看清了气球下面有3个人呆在一只筐里，其中一个举着望远镜。