If you refer to something or someone as a decoy, you mean that they are intended to attract people's attention and deceive them, for example by leading them into a trap or away from a particular place.
例句
Nick acted as a decoy after the dog attacked a group of children swimming in the river.那只狗攻擊了在河里游泳的一群孩子后，尼克作誘餌要將其捉住。He was booked on a flight leaving that day, but that was just a decoy.他訂了那天起飛的航班，但那不過是個誘餌。
N-COUNT
(用于吸引野鳥的)假鳥
A decoy is a model of a bird that is used to attract wild birds towards it so that people can study them or shoot them.
英漢詞典釋義
n.
用于引誘某人落入圈套的人或物
The enemy chased the decoys down to the place of ambush.敵人將誘騙者一直追到伏兵所在地。
vt.
用誘餌誘騙(某人或動物)落入圈套
More than ten missiles were decoyed away from targets.十多枚導彈受騙未命中目標。
英英詞典釋義
Noun
1. a beguiler who leads someone into danger (usually as part of a plot)