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1.aerial adj. 空中的，航空的；空气的；空想的 n. [电讯] 天线
The birds perched upon the television aerial.
那些鸟栖在电视天线上.
2.surveillance n. 监督；监视
He was arrested after being kept under constant surveillance.
他在被连续监视之后给逮捕了。
3.outfit n. 机构；用具；全套装备 vi. 得到装备 vt. 配备；供应
They outfitted for the long journey.
他们为远途旅行准备装束。
4.sensor n. 传感器
The latest Japanese vacuum cleaners contain sensors that detect the amount of dust and type of floor.
日本最新款吸尘器装有传感器，能测出灰尘量和地板类型。
