N-COUNT
诱饵;诱惑物;用作诱饵的人
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.
那只狗攻击了在河里游泳的一群孩子后，尼克作诱饵要将其捉住。
He was booked on a flight leaving that day, but that was just a decoy.
他订了那天起飞的航班，但那不过是个诱饵。