
好词典

源自拉丁语 'antenna'(帆桁),后用于指昆虫触角(因其形状相似),17世纪后引申为无线电天线。
❶ 昆虫或甲壳类动物头部的一对细长触角,用于感知周围环境、探测气味或触摸物体。
“The butterfly uses its antennae to detect the scent of flowers.”
(蝴蝶用触角探测花朵的气味。)
“Ants communicate by touching each other with their antennae.”
(蚂蚁通过触角相互触碰来交流。)
❶ 无线电或电视设备中用于接收或发射信号的金属杆状装置,即天线。
“The old radio had a retractable antenna for better reception.”
(旧收音机有一个可伸缩天线以获得更好的接收效果。)
“They installed a new antenna on the roof to get clearer TV signals.”
(他们在屋顶安装了新天线以获得更清晰的电视信号。)
antennae up — 形容人保持高度警觉或对某事物特别关注的状态,源自昆虫竖起触角的动作。
“Investors had their antennae up for any changes in the stock market.”
(投资者对股市的任何变化都保持高度警觉。)