THERE HAVE BEEN AT LEAST FOUR SUCH PIGEON PICK-UPS IN CHANGWA的意思

THERE HAVE BEEN AT LEAST FOUR SUCH PIGEON PICK-UPS IN CHANGWA的意思
THERE HAVE BEEN AT LEAST FOUR SUCH PIGEON PICK-UPS IN CHANGWA的意思

THERE HAVE BEEN AT LEAST FOUR SUCH PIGEON PICK-UPS IN CHANGWA的意思
在CHANGWA（台湾的某个城市）至少有四个这样的通信诈骗团伙.
原文如下：
Taiwan police cannot decide whether to treat it as an extremely eleven act of stealing or an even elev-ecer cheat (诈骗).Either way ,it could be the perfect crime (犯罪),because the criminals are birds—horning pigeons !
The crime begins with a telephone message to the owner of a stolen car :if you want the car back,pay up then,the car owner is directed to a park,told where to find a bird cage and how to attach money to the neck of the pigeon inside .Carrying the money in a tiny bag ,the pigeon flies off .
There have been at least four such pigeon pick-ups in Changwa.What at first seemed like the work of a clever stay-at-home car thief,however ,may in face be the work of an even lazier and more inventive criminal mind—one that avoid (避免)not only colleting money but going out to steal the car in the first place .Police officer Chen says that the criminal probably has pulled a double trick:he gets money for things he cannot possibly return .Instead of stealing cars ,he lets someone else do it and then waits for the car-owner to place an ad (启事) in the newspaper asking for help .
The theory is supported by the fact that ,so far ,none of the stolen cars have been returned .Also,the amount of money demanded-under 3,000 Taiwanese dollars –seems too little for a car worth many times more .
Demands for pigeon-delivered money stopped as soon as the press reported the story.And even if they start again,Chen holds little hope of catching the criminal .“We have more important things to do,” he said .

CHANGWA 曾经存在过至少四个信鸽站
changwa 也许是个地名，您没有给具体的信息，所以无法给您具体的地名

彰化（县或市）出现了至少四起这样的由信鸽接赎金的案件。pick-up是捡起，拾起的意思，在这里是接赎金。